#include <bits/stdc++.h>   using namespace std;   int main() {     int n, m, q = 0;     cin >> n >> m;     int k = n * m;     char a[k];     for (int j = 0; j < k; j++) {       cin >> a[k];       if (a[k] ==  M  || a[k] ==  Y  || a[k] ==  C ) {         q = 1;       }     }     if (q == 1) {       cout <<  #Color  << endl;     } else {       cout <<  #Black&White  << endl;     }   }   