i
doublesingle
singlesingle
double
B
leftRepeatsingle
singlesingle
rightRepeat
A
doublesinglesinglesinglesingle
singlesingledoublesingle
B
singlesingle
singlesingle
rightRepeat
A
doublesinglesinglesinglesingle
singlesingledouble
B
leftRepeatsingle
singlesingle
rightRepeatsingle
double
A
doublesinglesinglesinglesingle
singlesinglesinglesingledouble
B
leftRepeatsingle
singlesingle
rightRepeat