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ZOJ Problem Set - 4126
Digit Mode

Time Limit: 1 Second      Memory Limit: 65536 KB

Let $m(x)$ be the mode of the digits in decimal representation of positive integer $x$. The mode is the largest value that occurs most frequently in the sequence. For example, $m(15532)=5$, $m(25252)=2$, $m(103000)=0$, $m(364364)=6$, $m(114514)=1$, $m(889464)=8$.

Given a positive integer $n$, DreamGrid would like to know the value of $(\sum\limits_{x=1}^{n} m(x)) \bmod (10^9+7)$.

#### Input

There are multiple test cases. The first line of the input contains an integer $T$, indicating the number of test cases. For each test case:

The first line contains a positive integer $n$ ($1 \le n < 10^{50}$) without leading zeros.

It's guaranteed that the sum of $|n|$ of all test cases will not exceed $50$, where $|n|$ indicates the number of digits of $n$ in decimal representation.

#### Output

For each test case output one line containing one integer, indicating the value of $(\sum\limits_{x=1}^{n} m(x)) \bmod (10^9+7)$.

#### Sample Input

5
9
99
999
99999
999999


#### Sample Output

45
615
6570
597600
5689830


Author: LIN, Xi
Source: The 2019 ICPC China Shaanxi Provincial Programming Contest
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