Odd/Even Strings

Time limit1sMemory limit1024 MB

Level: Not classified yet
Solved: No attempts yet

Problem

Consider a string containing lowercase letters only. A string is odd if every letter in it appears an odd number of times. A string is even if every letter in it appears an even number of times.

Given a string, determine whether it is odd or even.

Input

There is one input line. It contains a string of lowercase letters only. The string has between 1 and 60 letters, inclusive.

Output

Print 0 if the string is even, 1 if the string is odd, and 0/1 if it is neither.

Examples3

Example 1
Input
```
geekkeeg
```
Expected output
```
0
```
Example 2
Input
```
funnyn
```
Expected output
```
1
```
Example 3
Input
```
zztop
```
Expected output
```
0/1
```