import sys
T = int(input())
nums = {'0' : '1110111',
'1' : '0010010',
'2' : '1011101',
'3' : '1011011',
'4' : '0111010',
'5' : '1101011',
'6' : '1101111',
'7' : '1110010',
'8' : '1111111',
'9' : '1111011',
' ' : '0000000'}
for k in range(T):
a, b = sys.stdin.readline().split()
a = (5 - len(a)) * ' ' + a
b = (5 - len(b)) * ' ' + b
total = 0
for i in range(5):
for j in range(7):
total += (nums[a[i]][j] != nums[b[i]][j]) # 다르면 더하라
print(total)
없음