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

int& Operator'++'(int& age) {
    if (age >= 0 && age < 120) {
        age++;
    }
    return age;
}

int main() {
    string name;
    int age;
    
    cin >> name >> age;
    
    if (age < 0 || age > 120) {
        cout << "imvalid input" << endl;
        return 0;
    }
    
    ++age;
    
    cout << name << ":" << age << endl;
    
    return 0;
}