1) 5 and 5 narrows it down to either one group of 5, another group of 5 or a group of 2. If it's a group of 2, skip to step 3.
2) Group of 5 breaks down to 2, 2 and 1. If 2 are equal it is the 1 left over.
3) If it's a group of 2, pick one and measure him against someone disqualified. If...