› kotlin sequences SubSequence T Sequence DropTakeSequence sequence startIndex Int endIndex count drop n iterator collections Iterator take8        ¸ "œ*B(( (J  2 (8HJ 8H–J 2 (8HR  8BHX‚R HX‚RHX‚RHX‚ò, H 0 0 8 0 0 0