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

int p1,p2,p3;

string f = "";

void tian(char a,char b){
	if(a == b || a > b){
		f = "-";
		return ;
	}
	if(a <= '9' && a >= '0' && b <= 'z' && b >= 'a'){
		f = "-";
		return ;
	}
	if(b <= '9' && b >= '0' && a <= 'z' && a >= 'a'){
		f = "-";
		return ;
	}
	for(char i = a + 1;i <= b - 1;i++){
		for(int j = 1;j <= p2;j++){
			if(p1 == 1){
				f += i;
			}
			else if(p1 == 2){
				if(i <= '9' && i >= '0'){
					f += i;
				}
				else{
					f += i - ('a' - 'A');
				}
			}
			else{
				f += '*';
			}
		}
	}
	if(p3 == 2){
		reverse(f.begin(),f.end());
	}
}

int main(){
	char a,b;
	string t,s = "";
	cin>>p1>>p2>>p3;
	cin>>t;
	for(int i = 0;i < t.size();i++){
		if(t[i] != '-'){
			a = t[i];
			s += t[i];
		}
		else{
			b = t[i + 1];
			tian(a,b);
			s += f;
			f = "";
		}
	}
	cout<<s<<endl;
    return 0;
}