2 str1 = [*"A".."M",*"n".."z",*"0".."9"].join("")
6 nonascii1 = [*"\u{c0}".."\u{cf}",*"\u{f0}".."\u{ff}"].join("")
7 nonascii10 = nonascii1 * 10
8 nonascii100 = nonascii10 * 10
9 nonascii1000 = nonascii100 * 10
11 swapcase-1: str1.swapcase
12 swapcase-10: str10.swapcase
13 swapcase-100: str100.swapcase
14 swapcase-1000: str1000.swapcase
15 swapcase-nonascii1: nonascii1.swapcase
16 swapcase-nonascii10: nonascii10.swapcase
17 swapcase-nonascii100: nonascii100.swapcase
18 swapcase-nonascii1000: nonascii1000.swapcase