208A - Dubstep

#include <cmath>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <iostream>
#include <string>
#include <vector>
#include <queue>
#include <algorithm>
using namespace std;

int main() {

    //freopen("aa.in", "r", stdin);

    string s1;
    string s2 = "";
    cin >> s1;
    int len = s1.length();
    for(int i = 0; i < len; ++i) {
        if(i + 2 < len && s1[i] == 'W' && s1[i+1] == 'U' && s1[i+2] == 'B') {
            s2 += " ";
            i += 2;
        } else {
            s2 += s1[i];
        }
    }
    s1 = "";
    len = s2.length();
    for(int i = 0; i < len; ++i) {
        if(s2[i] == ' ') {
            if(s1 != "") s1 += " ";
            while(i < len && s2[i] == ' ') ++i;
            --i;
        } else {
            s1 += s2[i];
        }
    }
    cout << s1 << endl;
    return 0;
}