uva11538測資A

Input:
2 2
100 223 
2300 1000
1234 5678
7777 88888
1 999999
999999 2
999999 999999
0 0
Output:
12
10907100
11514134000
64441649372
77258629337736
999997000002
1999999999994
3333319333351999992