#include<bits/stdc++.h>
using namespace std;
int main(){
	int m;
	string s;
	cin>>m>>s;
	int i=s.size()-1; 
	while(i>=0){
		if(s[i]==0){
			continue;
		}
		else{
			if(i==s.size()-1)
				cout<<s[i]<<"*"<<m<<"^"<<i;
			else
				cout<<"+"<<s[i]<<"*"<<m<<"^"<<i;
		}
		i--;
	}
	return 0;
}