C++Advanced-Map and Set - PhoneNumbers

#include<iostream>
#include<map>
#include<string>
#include<cctype>

void printResult(const std::map<std::string, std::string>& contacts, char searchedLetter) {
    int contactsCount = 0;
    for (auto it = contacts.begin(); it != contacts.end(); it++)
    {
        if (it->first[0] == searchedLetter)
        {
            std::cout << it->first << " " << it->second << std::endl;
            contactsCount++;
        }
    }
    if (contactsCount == 0 )
    {
        std::cout << "There are no contacts with such first letter" << std::endl;
    }
}

int main() {
    std::map<std::string, std::string>contacts = {
        {"Georgi", "0886123456"},
        {"Pesho", "0898435689"},
        {"Petar", "0898255689"},
        {"Ivan", "0876235416"},
        {"Tania", "052236589"},
        {"Silvia", "0982323456"},
        {"Gergana", "058236448"},
        {"Dimitar", "0884895456"},
        {"Pavlina", "0888456789"},
        {"Doncho", "0982456789"},
        {"Ivanina", "0882456789"},
    };
    contacts.insert(std::make_pair("Iliana", "0888935416"));
    contacts.erase("Petar");

    std::cout << "Enter a letter" << std::endl;
    char searchedLetter;
    std::cin >> searchedLetter;
    if (islower(searchedLetter))
    {
        searchedLetter = toupper(searchedLetter);
    }

    printResult(contacts, searchedLetter);
    return 0;
}