#include<cstdio>
#include<fstream>
#include<iostream>
#include<iomanip>
#include<algorithm>
#include<vector>
#include<bitset>
#include<deque>
#include<queue>
#include<set>
#include<map>
#include<cmath>
#include<cstring>
#include<ctime>
#include<cstdlib>

#define ll long long
#define pb push_back
#define mp make_pair
#define pii pair<int,int>
#define dbg(x) (cout<<#x<<" = "<<(x)<<endl)

using namespace std;


int main()
{
    //freopen("dreptunghiuri.in","r",stdin);
    //freopen("dreptunghiuri.out","w",stdout);

    //scanf("%d%d",&n,&m);

    const vector<char> colors = {'B','R','Y','G','W'};
    for(auto it:colors) cout<<it<<endl;

    return 0;
}