#include<bits/stdc++.h>
using namespace std;
int n;
int res4[4][8],res5[5][16];
string st4="BCCBBBCC",st5="BCCCBCBCBCBCBBBC";
int main() {
    cin>>n;
    if (n==4) {
        for (int j=0;j<(1<<(n-1));j++) res4[0][j]=st4[j]-'B';
        for (int i=1;i<n;i++) {
            for (int j=0;j<(1<<(n-1));j++) {
                res4[i][(j>>1)|((j&1)<<(n-2))]=res4[i-1][j];
            }
        }
        for (int i=0;i<n;i++) {
            for (int j=0;j<(1<<(n-1));j++) if (res4[i][j]==0) cout<<'B';else cout<<'C';
            cout<<endl;
        }
        return 0;
    }
    if (n==5) {
        for (int j=0;j<(1<<(n-1));j++) res5[0][j]=st5[j]-'B';
        for (int i=1;i<n;i++) {
            for (int j=0;j<(1<<(n-1));j++) {
                res5[i][(j>>1)|((j&1)<<(n-2))]=res5[i-1][j];
            }
        }
        for (int i=0;i<n;i++) {
            for (int j=0;j<(1<<(n-1));j++) if (res5[i][j]==0) cout<<'B';else cout<<'C';
            cout<<endl;
        }
        return 0;
    }
    return 0;
}