MxN as Couples, MxN Tandem, MxN-some

Divide people into couples or tandems the same way you would for the MxN concept — count from front to back or right to left. Then do the call in those groups. The number 1 means that person isn't paired at all.

\sxvlines{b3s,g3s,b4s,g4s} \sxvlines{g2s,b3n,g3n,b4n}
3 1 3 1 4 2 4 2 2 4 3 1 3 1 4 2
before 1x3-some Couple Up after