STRSLICE("ABC",0,1): A
STRSLICE("ABC",1,2): B
STRSLICE("ABC",2,3): C
STRSLICE("ABC",-3,-2): A
STRSLICE("ABC",-2,-1): B
STRSLICE("ABC",-1,-0): 
STRSLICE("ABC",-1,3): C
STRSLICE("ABC",1): BC
STRSLICE("ABC",-2): BC
STRSLICE("ABC",4): 
STRSLICE("ABC",-4): ABC
STRSLICE("ABC",0,2): AB
STRSLICE("ABC",1,3): BC
STRSLICE("ABC",1,31): BC
STRSLICE("ABC",1,300): BC
STRSLICE("ABC",-4,300): ABC
STRSLICE("ABC",3,3): 
STRSLICE("ABC",4,4): 
STRSLICE("ABC",3,4): 
STRSLICE("カタカナ",0,2): カタ
STRSLICE("カタカナ",2,4): カナ
STRSLICE("カタカナ",2,12): カナ
STRSLICE("g̈",0,1): g
STRSLICE("g̈",0,2): g̈
STRSUB("ABC",1,1): A
STRSUB("ABC",2,1): B
STRSUB("ABC",3,1): C
STRSUB("ABC",-3,1): A
STRSUB("ABC",-2,1): B
STRSUB("ABC",-1,1): C
STRSUB("ABC",2): BC
STRSUB("ABC",0): ABC
STRSUB("ABC",-2): BC
STRSUB("ABC",5): 
STRSUB("ABC",-5): ABC
STRSUB("ABC",1,2): AB
STRSUB("ABC",2,2): BC
STRSUB("ABC",2,32): BC
STRSUB("ABC",2,300): BC
STRSUB("ABC",-4,300): ABC
STRSUB("ABC",4,0): 
STRSUB("ABC",5,0): 
STRSUB("ABC",4,1): 
STRSUB("カタカナ",1,2): カタ
STRSUB("カタカナ",3,2): カナ
STRSUB("カタカナ",3,10): カナ
STRSUB("g̈",1,1): g
STRSUB("g̈",1,2): g̈