$hash{ $_->[0] } = $_->[1] and print "@$_\t", scalar keys %hash, scalar %hash 
    for [1,2],[3,4],[5,6],[7,8],[9,10],[11,12],[15,16],[22,34],[88,99];;
1 2      1 1/8
3 4      2 2/8
5 6      3 3/8
7 8      4 4/8
9 10     5 5/8
11 12    6 5/8 * 
15 16    7 5/8 *
22 34    8 6/8
88 99    9 7/8 ???