水

#include <bits/stdc++.h>
using namespace std;

int t[10];
string s;
int n;

int main(){
    cin >> s >> n;
    while (n--){
        string ns = "";
        for (int i=0;i<s.size();i++){
            int t = i;
            while (s[i+1]==s[i]){
                i++;
            }
            int x = i-t+1;
            int y = s[t]-'0';

            ns += to_string(x) + to_string(y);
        }
        s = ns;
    }

    cout << s;
    
    return 0;
}