// from https://github.com/sol-prog/regex_tutorial
#include <iostream>
#include <regex>
#include <string>

using namespace std;

int main() {
	string input;

    // traditional pcre escape
    regex int_re {"(\\+|-)?\\d+"};

    // ecmascript
	regex float_re {"((\\+|-)?[[:digit:]]+)(\\.(([[:digit:]]+)?))?((e|E)((\\+|-)?)[[:digit:]]+)?"};

    while(cin >> input){
        if (regex_match(input, int_re)) {
			cout << "integer" << endl;
        }
        else if(regex_match(input, float_re)) {
			cout << "float" << endl;
        }
		else {
			cout << "nan" <<endl;
		}
	}
}