#include <stdio.h>
#include <assert.h>

#define MAXN 10

int main() {
    int N, K;
    char model[MAXN][MAXN+1];

    assert(2 == scanf("%d %d", &N, &K));
    for (int i=0; i<N; i++)
        assert(1 == scanf("%s", model[i]));

    // insert your code here
    
    return 0;
}