#include <bits/stdc++.h>
using namespace std;
bool ss(int n){
	for(int i=2;i<n;i++){
		if(n%i==0){
			return 0;
		}
	}
	return 1;
} 
int main(){
	int i,n,s=0;
	char a[99];
	cin>>a;
	for(i=0;i<strlen(a)-2;i++){
		if(ss((a[i]-48)*10+(a[i+1]-48))&&ss((a[i]-48)+(a[i+1]-48)*10)){
			if(s==0){
				s++;
			}
			else
				cout<<",";
			cout<<(a[i]-48)*10+a[i+1]-48;
		}
	}
	
	return 0;
	}

/**************************************************************
	Problem: 1138
	User: fzy001
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/