i
doublesingle
single
singledouble
A
leftRepeatsingle
single
singlesingle
singlesingle
single
singledouble
B
doublesingle
single
singlesingle
singlesingle
single
singlesingle
singlesingle
single
singlerightRepeat
C
leftRepeatsingle
single
singlerightRepeat
D
leftRepeat
single
single
single
rightRepeat
single
single
single
singlesingle
single
single
single
singledouble