ac

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.*;

public class Main {
    public static Scanner sc = new Scanner(System.in);

    public static BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

    public static void main(String[] args) throws Exception {
        String s = sc.next();
        change(s);
    }

    static void change(String s){
        if(s == null || s.isEmpty()){
            return;
        }
        int n = s.length();
        char[] arr = s.toCharArray();

        boolean first = true;
        char lastChar = arr[0];
        int cnt = 1;
        for(int i=1;i<n;i++){
            if(arr[i] == lastChar){
                cnt++;
            }else {
                if(first) {
                    System.out.print(lastChar + "_" + cnt);
                    first = false;
                }else {
                    System.out.print("_" + lastChar + "_" + cnt);
                }
                lastChar = arr[i];
                cnt = 1;
            }
        }
        if(cnt != 0) {
            if (first) {
                System.out.print(lastChar + "_" + cnt);
            }else {
                System.out.print("_" + lastChar + "_" + cnt);
            }
        }
        System.out.println();
    }


}
/*
aaabbbbcccd
a_3_b_4_c_3_d_1

offerofferzainaliiiiii
o_1_f_2_e_1_r_1_o_1_f_2_e_1_r_1_z_1_a_1_i_1_n_1_a_1_l_1_i_6

hhhaaa
h_3_a_3
 */