#include <iostream>
#include <queue>
#include <algorithm>
#include <vector>
#include <algorithm>
#include <set>
#include <cstring>

using namespace std;
char s[10005];
int main() {
    ios_base::sync_with_stdio(false);
    int a, b, c;
    cin >> a >> b >> c;
    int x = a+b+c;
    vector<int> v;
    v.push_back(0);
//    for(int i = 1; i <= x; i++) {
//        s[i] = ' ';
//    }
    for (int i = 0; i < a; i++) {
        int k;
        cin >> k;
        v.push_back(k);
        s[k] = 'A';
    }
//    for (int i = 1; i < x+1; i++) {
//        cout << s[i];
//    }
    v.push_back(a + b + c + 1);
    int max = -1;
    for (int i = 0; i < v.size(); i++) {
        int tmpb = b;
        int tmpc = c;
        bool ok = true;
        int cnt = 0;
        for (int j = 1; j < v.size(); j++) {
            if (cnt < i) {
                cnt++;
                int range = (v[j] - v[j - 1]) - 1;
                if (range % 2 == 0) {
                    if (tmpb >= range / 2 && tmpc >= range / 2) {
                        tmpb -= range / 2;
                        tmpc -= range / 2;
                    } else {
                        ok = false;
                        break;
                    }
                }
                if (range % 2 == 1) {
                    if (tmpb >= range / 2 + 1 && tmpc >= range / 2) {
                        tmpb -= range / 2 + 1;
                        tmpc -= range / 2;
                    } else {
                        ok = false;
                        break;
                    }
                }
            } else {
                int range = (v[j] - v[j - 1]) - 1;
                if (range % 2 == 0) {
                    if (tmpb >= range / 2 && tmpc >= range / 2) {
                        tmpb -= range / 2;
                        tmpc -= range / 2;
                    } else {
                        ok = false;
                        break;
                    }
                }
                if (range % 2 == 1) {
                    if (tmpb >= tmpc && tmpb >= range / 2 + 1 && tmpc >= range / 2) {
                        tmpb -= range / 2 + 1;
                        tmpc -= range / 2;
                    } else if (tmpc >= range / 2 + 1 && tmpb >= range / 2) {
                        tmpb -= range / 2;
                        tmpc -= range / 2 + 1;
                    } else {
                        ok = false;
                        break;
                    }
                }
            }
        }
        if (ok) {
            max = i;
        }
    }
    bool daliB = false;
    int cc = 0;
    for (int i = 1; i < v.size(); i++) {
        if (cc <= max) {
            cc++;
            daliB = true;
            for (int j = v[i - 1] + 1; j < v[i]; j++) {
                if (daliB) {
                    s[j] = 'B';
                    daliB = false;
                    b--;
                } else if (!daliB) {
                    s[j] = 'C';
                    daliB = true;
                    c--;
                }
            }
        } else {
            int range = (v[i] - v[i - 1]) - 1;
            if (range % 2 == 0) {
                daliB = true;
                for (int j = v[i - 1] + 1; j < v[i]; j++) {
                    if (daliB) {
                        s[j] = 'B';
                        daliB = false;
                        b--;
                    } else if (!daliB) {
                        s[j] = 'C';
                        daliB = true;
                        c--;
                    }
                }
            } else {
                if (b >= c) {
                    daliB = true;
                    for (int j = v[i - 1] + 1; j < v[i]; j++) {
                        if (daliB) {
                            s[j] = 'B';
                            daliB = false;
                            b--;
                        } else if (!daliB) {
                            s[j] = 'C';
                            daliB = true;
                            c--;
                        }
                    }
                } else {
                    daliB = false;
                    for (int j = v[i - 1] + 1; j < v[i]; j++) {
                        if (daliB) {
                            s[j] = 'B';
                            daliB = false;
                            b--;
                        } else if (!daliB) {
                            s[j] = 'C';
                            daliB = true;
                            c--;
                        }
                    }
                }
            }
        }
    }
    if(max == -1){
        cout << -1;
    }
    else{
        for (int i = 1; i < x+1; i++) {
            cout << s[i];
        }
    }
}
//1viot for loop - Kolku od prvite rangeovi sakame da ni zapocnat so B
//2riot for loop = Dali da mozeme da gi stavime i rangevi so B
// i= 0  -- >  sakam 0 rangeovi da ni pocne so b;
// j=1  -- >   2 - 0  -- CBC
// BCABCBACBCACBCACBCABCBACBCABCABCA
// BCABCBABCBABCBACBCACBCACBCABCABCAProgram