#include <stdio.h>
#include <stdlib.h>
int main(int argc, const char * argv[]) {
  
    int a, b;
    scanf("%d%d", &a, &b);
    
    if(a < b) {
        while(a <= b) {
            printf("%d ", a);
            a++;
        }
    }
    else {
        while(b <= a) {
            printf("%d ", b);
            b++;
        }
    }
    
    return 0;
}