map(int, raw_input())

# -*- coding: cp1251 -*-
import random

class Game(object):
    def __init__(self):
        self.play=True
        self.new()
        self.run()

    def run(self):
        while self.play:
            self.plword=raw_input()
            l=map(int,self.plword)
            l=l[:4]
            for i in xrange(len(l)):
                if l[i]==self.word[i]:
                    print "Корова",
                else: print "Бык",
            print
            if l==self.word:
                print "Вы выйграли!!!"
                self.play=False

    def new(self):
        self.word=map(int,str(random.randrange(1000,9999)))

g=Game()

 
#! /usr/bin/env python
from random import randint
# from text to numbers in array
def texttoar(a):
    b=0
    c=[]
    while b<len(a):
        c= c +[int(a[b])]
        b+=1
    return c
# random number in array without same numbers
def number(x):
    a=[]
    c=0
    while len(a) != len(same(a)) or c != x:
        c=0
        a=[]
        while c<x:
            b=randint(0,9)
            a=a+[b]
            c+=1
    return a
# from number to array
def inarray(a):
    s=[]
    e=1
    while e<=a:
        e=e*10
    e=e/10
    b=a
    z=10
    while b>0:
        c=b%z
        s=[c]+s
        b=(b-c)/10
    return s
# remove same numbers
def same(a):
    b=[]
    for i in range(len(a)):
        if a[i] not in b:
            b=b+[a[i]]
    return b
# lets count cows and bulls
def howmany(a,b):
    c=0
    d=0
    for i in range(len(b)):
        if a[i] == b[i]:
            c+=1
    b=same(b)
    for w in range(len(b)):
        if b[w] in a:
            d+=1
    return c, d-c
# transform owr array to number
def arraytotext(a):
    b=10**(len(a)-1)
    c=0
    for i in range(len(a)):
        c=a[i]*b+c
        b=b/10
    return c
print  "===Lets start the game==="
a= number(4)
b= []
c=1
while a!=b:
    b= raw_input("Try to guess the number:")
    b= texttoar(b)
    if len(a) != len(b):
        print "Write the number correctly"
    elif a == b:
        print "=========Congratulations, you win in:", c , " turns========="
        print "=========Your number was:", arraytotext(a), "========="
        if c > 7:
            print "=========I am shure you can better========="
        else :
            print "==========It is a very good result=========="            
    else:
        bulls, cows = howmany(a,b)
        print bulls, " Bulls and ",cows, " Cows"   
    c+=1