#include<iostream> #include<algorithm> #include<stdio.h> #include<stdlib.h> #include<vector> #include<string> #include<sstream> #include<math.h> using namespace std; int main(){ int w, h; char c; cin >> w >> h >> c; bool b = false; for(int i=0; i<h; i++){ if( (c == 'B' && i%2 == 0)||(c == 'W' && i%2 == 1) ) b = true; else b = false; for(int j=0; j<w; j++){ if( b ){ if( j%2 == 0 ) cout << "B"; else cout << "W"; }else{ if( j%2 == 0 ) cout << "W"; else cout << "B"; } } cout << endl; } return 0; }