/**
 * MIDI Olympiad in Informatics 2007
 * Personal Code reference solution
 * by Adomas Paltanavicius
 */

#include <stdio.h>
#include <stdlib.h>

#define OK   1
#define FAIL 0

const char infile[] = "pcode.in";
const char outfile[] = "pcode.out";

char coeff1[10] = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 1 };
char coeff2[10] = { 3, 4, 5, 6, 7, 8, 9, 1, 2, 3 };
int all_month_days[12] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };

char code[11];
int year, month, day;

/* Output answer to file. */
void answer(int ok) {
    freopen(outfile, "w", stdout);
    printf("%s\n", ok ? "OK" : "FAIL");
    exit(0);
}

/* Calculate checksum. */
int checksum() {
    int sum, i;
    for (i = sum = 0; i < 10; i++) {
	sum += coeff1[i] * code[i];
    }
    if (sum % 11 == 10) {
	for (i = sum = 0; i < 10; i++) {
	    sum += coeff2[i] * code[i];
	}
	if (sum % 11 == 10) {
	    sum = 0;
	}
    }
    return sum % 11;
}

void validate_date() {
    /* First, validate month and day. Then,
     * look if date is not in future.
     */
    int year_leap = year%4==0 && (year%100!=0 || year%400==0);
    int month_days;

    /* Check month. */
    if (month < 1 || month > 12)
	answer(FAIL);

    /* Check day. */
    month_days = all_month_days[month - 1];
    if (month == 2 && year_leap)
	month_days++;
    if (day < 1 || day > month_days)
	answer(FAIL);

    /* No later than 2007 april 28th. */
    if (year > 2007 || 
        (year == 2007 && (month > 4 || 
	                  (month == 4 && day > 28)))) {
	answer(FAIL);
    }
}

/* Check code. */
void check() {

    /* Get century */
    if (code[0] > 0) {
	year = 1700 + 100 * (code[0] + 1) / 2;
    } else {
	answer(FAIL);
    }
    year += code[1] * 10 + code[2];
    month = code[3] * 10 + code[4];
    day = code[5] * 10 + code[6];
    validate_date();

    if (code[10] != checksum()) {
	answer(FAIL);
    } else {
	answer(OK);
    }
}

int main() {
    int i;
    freopen(infile, "r", stdin);
    scanf("%11s", code);
    /* Convert to number. */
    for (i = 0; i < 11; i++)
	code[i] -= '0';
    check();
    return 0;
}