A.cpp

/*****                                            
                                                     __Bismillahir Rahmanir Rahim__
                                               American International University Bangladesh (AIUB) 
                                                          Hadiur Rahman Nabil
                                                                 
                                                               
                                                          
*****/
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef long double ld;
typedef vector <int> vi;


#define pb push_back
#define mp make_pair
#define gcd(a,b) __gcd(a,b)
#define endl "\n"

const int mod = 1e9 + 7;
const double PI = 3.1415926535897932384626;
const int mod_2 = 998244353;
const int MAX=100005;

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    

int n,m;
cin>>n>>m;
for(int i=1;i<=n*m;i++)
{

char c;
cin>>c;

if(c=='C' || c=='M' || c=='Y')
    {
     cout<<"#Color\n";
     return 0;
    }
    

}
cout<<"#Black&White\n";
return 0;     
   

}