简单题。
#pragma comment(linker, "/STACK:1024000000,1024000000")
#include<cstdio>
#include<cstring>
#include<cmath>
#include<algorithm>
#include<vector>
#include<map>
#include<set>
#include<queue>
#include<stack>
#include<iostream>
using namespace std;
typedef long long LL;
const double pi=acos(-1.0),eps=1e-;
void File()
{
freopen("D:\\in.txt","r",stdin);
freopen("D:\\out.txt","w",stdout);
}
template <class T>
inline void read(T &x)
{
char c = getchar(); x = ;while(!isdigit(c)) c = getchar();
while(isdigit(c)) { x = x * + c - ''; c = getchar(); }
} int n,m;
bool f; int main()
{
scanf("%d%d",&n,&m);
for(int i=;i<=n;i++)
{
for(int j=;j<=m;j++)
{
char op[]; scanf("%s",op);
if(op[]=='C'||op[]=='M'||op[]=='Y') f=;
}
}
if(f) printf("#Color\n");
else printf("#Black&White\n");
return ;
}