Openjudge: count the number of numeric characters

describe

Enter a line of characters , Count out the number of digital characters .

Input

One line string , The total length does not exceed 255.

Output

Output is 1 That's ok , The number of numeric characters in the output string .

The sample input

Peking University is set up at 1898.

Sample output

4

Code 1

s = input()
sum  = 0
for i in s:
    if '0'<= i <='9':
        sum += 1
print(sum)

Code 2

s = input()
sum = 0
for i in s:
    if i.isdigit():
        sum += 1
print(sum)