> #include <iostream>
> #include <cstdio>
> #include <string>
> #include <algorithm>
> #include <map>
> #include <cstring>
> #include <sstream>
> /* run this program using the console pauser or add your own getch, system("pause") or input loop */
> using namespace std;
> string data;
> int m[10];
> map<string,int> v;
> bool flag = 0;
> int flagLength = 0;
> string change(string data) {
> 	string re = "";
> 	int i;
> 	memset(m,0,sizeof(m));
> 	for(i = 0; i < data.length(); i++) {
> 			m[(data[i]-'0')] ++;
> 	}
> 	
> 	for(i = 0; i <= 9; i++) {
> 		if(m[i] != 0) {
> 			stringstream ss;
> 			ss << re << m[i] << i;
> 			re = ss.str();
> 			
> 		}	
> 	}
> 	
> 	return re;
> }
> 
> int self_inventorying(string data) {
> 	v.clear();
> 	int i;
> 	string s = data;
> 	string temp;
> 	v[s] = 0;
> 	for(i = 0; i < 15; i++) {
> 		temp = change(s);
> 		//cout << temp << endl;
> 		if(temp == s) {
> 			break;
> 		}else {
> 			if(v.count(temp) && flag == 0) {
> 				flag = 1;
> 				flagLength = i+1-v[temp];
> 				s = temp;
> 				continue;
> 			}else {
> 				s = temp;
> 				v[temp] = i+1;
> 				//cout << temp << " " << v[temp] << endl;
> 			}
> 				
> 		}
> 	}	
> 	return i;
> }
> int main() {
> 	while(1) {
> 		cin >> data;
> 		if(data == "-1") {
> 			break;
> 		}else {
> 			flagLength = 0;
> 			flag = 0;
> 			int i= self_inventorying(data);
> 			if(i == 0) {
> 				cout << data << " is self-inventorying" << endl;
> 			}else if(i < 15) {
> 				cout << data << " is self-inventorying after " << i << " steps" << endl;
> 			}else if(i >= 15 && flag == 1) {
> 				cout << data << " enters an inventory loop of length " << flagLength << endl; 
> 			}else {
> 				cout << data << " can not be classified after 15 iterations" << endl;
> 			}
> 			
> 		}
> 		
> 	}
> 	return 0;
> }