#include<bits/stdc++.h>
using namespace std;
#define RG 
#define LL long long
#define gc getchar
const int mxn=5010;
int n;
char s[mxn][mxn];
inline int rd(){
	int s=0,w=1,ch=gc();
	while(ch<'0'||ch>'9'){
		if(ch=='-')w=-1;
		ch=gc();
	}
	while(ch>='0'&&ch<='9')s=s*10+ch-'0',ch=gc();
	return s*w;
}
int main(){
	n=rd();
	for(int x=1,i=1,k=n;i<=n;--k,x^=1,i+=2)
		if(x&1)
			for(int j=n;j>n-k;--j)
				s[i][j]='W';
		else
			for(int j=1;j<=k;++j)
				s[i][j]='W';
	for(int x=1,i=2,k=1;i<=n;++k,x^=1,i+=2)
		if(x&1)
			for(int j=1;j<=k;++j)
				s[i][j]='W';
		else
			for(int j=n;j>n-k;--j)
				s[i][j]='W';
	for(int i=1;i<=n;++i)
		for(int j=1;j<=n;++j)
			if(s[i][j]!='W')
				s[i][j]='B';
	for(int i=1;i<=n;++i) puts(s[i]+1);
	return 0;
}