判斷 單或双 (10992)

C2=MID("全双单双全单",SUM(MOD(MID(B2,{1;2},1),2))*2+1,2)

另解=TEXT(SUM(-1^MID(B2,{1,2},1)),"全双;全单;单双")

可分 双单與单双=MID("全双双单单双全单",SUM({4,2}*MOD(MID(B2,{1,2},1),2))+1,2)