h[2],a[2],q;
f(c,d){
~scanf("%c%d\n",&c,&d)?f(),
a[q=(c&127)=='R']==d?a[1-q]=a[1-q]?a[1-q]-1:h[q]-1:0:0;
}
main(){scanf("%d%d%*d\n",h,h+1);f();*a=!puts(*a+a[1]&1?"black":"white");}