5
13 20 22 43 146
4
13 22 43 146
5
13 43 67 89 146

1 step) you compare first and second sequence, there are such equal digits as:
13, 22, 43, 146 ( are in both sequence ) *
2 step). you must compare third sequence with sequence, what you got from first step
     13, 22, 43, 146  *
      compare with
     13 43 67 89 146.
there are such equal digits as:
13, 43, 146 ( in both sequence )
3) after step 1-2 you have 13, 43, 146 answer: 3 ( numbers in the three sequences )