#include <iostream>
#include <unordered_map>
#include <string>
using namespace std;

int main() {
    string s = "abacbcde";
    ____________ // 横线处填入正确代码
    for (char c : s) {
        freq[c]++;
    }
    for (auto& p : freq) {
        cout << p.first << ":" << p.second << " ";
    }
    return 0;
}