#include <iostream>

using std::cout;
using std::endl;
using std::cin;

void S();
void A();
void B();

void S()
{
    char c;
    if (!(cin >> c)) {
        throw "fail";
    }
    if (c == '1') {
        A();
        if (!(cin >> c)) {
            throw "fail";
        }
        if (c != '0') {
            throw c;
        }
    } else {
        throw c;
    }
}

void A()
{
    char c;
    if (!(cin >> c)) {
        throw "fail";
    }
    if (c == '1') {
        A();
        if (!(cin >> c)) {
            throw "fail";
        }
        if (c != '0') {
            throw c;
        }
    } else if (c == '0') {
        B();
        if (!(cin >> c)) {
            throw "fail";
        }
        if (c != '1') {
            throw c;
        }
    } else {
        throw c;
    }
}

void B()
{
    char c;
    if (!(cin >> c)) {
        throw "fail";
    }
    if (c == '0') {
        B();
        if (!(cin >> c)) {
            throw "fail";
        }
        if (c != '1') {
            throw c;
        }
    } else {
        cin.putback(c);
    }
}

int main()
{
    while (true) {
        try {
            S();
        } catch (char c) {
            if (isspace(c)) {
                cout << "WIN" << endl;
                try {
                    S();
                } catch (...) {
                    throw;
                }
            } else {
                throw;
            }
        } catch (...) {
            cout << "FAIL" << endl;
            return 0;
        }
    }
}