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CSES Problem Set

Creating Strings II


Task | Statistics


CSES - Creating Strings IICSES - 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
Example

Input:
aabac

Output:
20