7661: [CSES Problem Set] Creating Strings II
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Description
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
$1≤n≤10^6$
Sample 1 Input
aabac
Sample 1 Output
20