#include <string>
#include <iostream>
#include <fstream>
#include <vector>

//disables any deprecation warning
#pragma warning(disable : 4996)

//usings
using std::vector;
using std::string;
using std::cout;


string repops(string expr) {
    string iexpr = expr;
    for (int i = 0; i < iexpr.length(); i++) {

        char& c = iexpr[i];

        if (c == '+') {
            iexpr.replace(i, 1, " add ");
        }
        if (c == '-') {
            iexpr.replace(i, 1, " subtract ");
        }
        if (c == '*') {
            iexpr.replace(i, 1, " multiply ");
        }
        if (c == '/') {
            iexpr.replace(i, 1, " divide ");
        }
    }
    return iexpr;
}

int main() {
    cout << repops("1+2-1");
    std::cin.get();
    return 0;
}