sort -nk2 -nr srt

Input:                      Desired Output:
1 22                       1 77
2 22                       2 77
1 22                       1 77
2 99                       2 77
1 22                       1 77
2 77                       2 22
1 77                       1 22
2 22                       2 22
1 77                       1 99
2 99                       2 99