#include 
#include 
 
using namespace std;
 
int main()
{
    int n;
    int m;
    cin>>n>>m;
    int n1;
    int m1;
    int k;
    int k1;
 
 
    queueq;
    char matrica[n][m];
    for(int x=0; x>matrica[x][x1];
        }
    }
    for(int y=0; y=0)and(ti=0)and(tj=0)and(ti=0)and(tj=0)and(ti=0)and(tj=0)and(ti=0)and(tj=0)and(ti=0)and(tj=0)and(ti=0)and(tj