CSES - Creating Strings II
  • Time limit: 1.00 s
  • Memory limit: 512 MB

Given a string, your task is to calculate the number of different strings that can be created using its characters.

Input

The only input line has a string of length n. Each character is between a–z.

Output

Print the number of different strings modulo 10^9+7.

Constraints

  • 1 \le n \le 10^6

Example

Input:

aabac

Output:

20