#include <iostream>
#define SIZE 30
#include <bits/stdc++.h>

using namespace std;

void printCharWithFreq(string str)
{
    int n = str.size();

    int freq[SIZE];

    memset(freq, 0, sizeof(freq));

    for (int i = 0; i < n; i++)
        freq[str[i] - 'a']++;

    for (int i = 0; i < n; i++)
    {
        if (freq[str[i] - 'a'] != 0)
        {

            cout << str[i] << freq[str[i] - 'a'] << " ";
        }
        freq[str[i] - 'a'] = 0;
    }
}

int main()
{
    string str = "venividivici";
    printCharWithFreq(str);

    return 0;
}