求求各位大佬们帮帮本蒟蒻给代码捉捉虫吧！

#include<iostream>
using namespace std;
int main(){
    string q,in;
    while(getline(cin,in)) q+=in;
    q.erase(in.size()-1);
    int i,j,r,b;
    for(i=0;i<q.size();i+=11){
        r=0,b=0;
        for(j=i;j<i+11 && j<q.size();j++)
            if(q[j]=='W') r++;
            else b++;
        cout<<r<<":"<<b<<endl;
    }
    cout<<endl;
    for(i=0;i<q.size();i+=21){
        r=0,b=0;
        for(j=i;j<i+21 && j<q.size();j++)
            if(q[j]=='W') r++;
            else b++;
        cout<<r<<":"<<b<<endl;
    }
}