//μ's forever
#include <bits/stdc++.h>
#define N 505
//#define getchar nc
using namespace std;
inline char nc(){
    static char buf[100000],*p1=buf,*p2=buf;
    return p1==p2&&(p2=(p1=buf)+fread(buf,1,100000,stdin),p1==p2)?EOF:*p1++;
}
inline int read()
{
    register int x=0,f=1;register char ch=getchar();
    while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}
    while(ch>='0'&&ch<='9')x=(x<<3)+(x<<1)+ch-'0',ch=getchar();
    return x*f;
}
inline void write(register int x)
{
    if(!x)putchar('0');if(x<0)x=-x,putchar('-');
    static int sta[20];register int tot=0;
    while(x)sta[tot++]=x%10,x/=10;
    while(tot)putchar(sta[--tot]+48);
}
int n;
char s[N][N];
int main()
{
    n=read();
    for(int i=1;i<=n;++i)
        for(int j=1;j<=n;++j)
            s[i][j]='W';
    int a=1,b=0;
    if(n%2==0) a=2,b=1;
    while(a<=n){
        for(int i=b;i<n;++i) s[a][i]='B';
        for(int i=a;i<=n;++i) s[i][b]='B';
        a+=2,b+=2;
    }
    for(int i=1;i<=n;++i){
        for(int j=1;j<=n;++j)
            putchar(s[i][j]);
        printf("\n");
    }
    return 0;
}