C++ :

#include<iostream>
#include<string>
#include<cstring>
using namespace std;
int s, t, w;
string num;
bool hasNext(int i, char c) {
	if (c>=('a'+t-1-(w-1-i))) return false;
	else return true;
}
void changeLater(int i) {
	for (i++; i < w; i++)
		num[i] = num[i-1]+1;
}
void next() {
	for (int i = w-1; i >= 0; i--) {
		if (hasNext(i, num[i])) {
			num[i] = num[i]+1;
			changeLater(i);
			break;
		}
	}
	cout << num << endl;
}
int main() {
	while (cin >> s >> t >> w) {
		cin >> num;
		for (int i = 0; i < 5; i++)
			next();
	}
	return 0;
}