O: join

Ϊk: join [ladder name]

:

    oӫOAiH[JYӫwƦW, pG[Ѽ, K|ܩҦAi
[JƦWɡC

td:
  join ladder9      [JEƦWɡC
  join              ܩҦƦWɡC

O:  drop match ladder9 ladder19
