#include <iostream>
using namespace std;
int s, t, w;
char a[30];
void p()
{
	if(a[w-1] == 'a'+t-1)
	{
		int i = w-2;
		if(a[i] == 'a'+t-2) i--;
		while(i >= 0 && a[i] == a[i+1]+1) i--;
		if(a[i]+1 == 'a'+t-2 && i <= w-3) i--;
		a[i]++;
		for(int j = i+1;j < w;++j)
		{
			a[j] = a[j-1]+1;
		}
		return;
	}
	a[w-1]++;
}
int main()
{
	cin >> s >> t >> w;
	cin >> a;
	int i = 1;
	while(i <= 5 && a[0]-'a'+1 != t)
	{
		p();
		cout << a << endl;
		i++;
	}
	return 0;
}