test=gets.to_i
while test>0
s=gets.chomp
count=0
for i in 0...s.length
if s[i]!='4' && s[i]!='7'
count=count+1
end
puts s[i]+count.to_s
end
puts count
test=test-1
end
dGVzdD1nZXRzLnRvX2kKd2hpbGUgdGVzdD4wCglzPWdldHMuY2hvbXAKCWNvdW50PTAKCWZvciBpIGluIDAuLi5zLmxlbmd0aAoJCWlmIHNbaV0hPSc0JyAmJiBzW2ldIT0nNycKCQkJY291bnQ9Y291bnQrMQoJCWVuZAoJCXB1dHMgc1tpXStjb3VudC50b19zCgllbmQKCXB1dHMgY291bnQKCXRlc3Q9dGVzdC0xCmVuZA==