Problem:
Digit Number

Write a program which computes the digit number of sum of two integers a and b.

Input

There are several test cases. Each test case consists of two non-negative integers a and b which are separeted by a space in a line. The input terminates with EOF.

Constraints

0 ≤ a, b ≤ 1,000,000

The number of datasets ≤ 200

Output

Print the number of digits of a + b for each data set.

Sample Input

5 7
1 99
1000 999

Output for the Sample Input

2
3
4

Solution in Ruby (judge verdict: Accepted)

while n = gets
  i=1
  sum=0
  a, b = n.chomp.split
  a, b = a.to_i, b.to_i
  sum = a+b
  while sum / 10 != 0
    sum = sum / 10
    i = i+1
  end
  p i
end