#include <iostream>

using namespace std;

int main() {
    string s = "kitten in a cup";
    cout << "start line: " << s;
    int j = -1;
    for (int i = 0; i < s.length(); ++i) {
        if (s[i] == 'k') {
            s[i] = 'c';
            j = i;
            break;
        }
        if (i + 1 == s.length()) {
            cout << endl << "there is no 'k' in the initial line";
        }
    }
    for (int i = s.length(); i > 0; i--) {
        if (s[i] == 'c' && i != j) {
            s[i] = 'k';
            break;
        }
        if (i - 1 == 0) {
            cout << endl << "there is no 'c' in the initial line";
        }
    }
    cout << endl << "processed string: " << s;

}