from random import *
N = 4
a = range(1, 10)
shuffle(a)
a = ''.join(map(str,a[:N]))
x = ''
while x!=a:
hit, blow = 0, 0
x = raw_input('Input %d digit number: ' % N)
for i, e in enumerate(a):
if x[i]==e: hit += 1
for e in a:
if e in x: blow += 1
blow -= hit
print '%d hit, %d blow' % (hit, blow)