val a1 = 'a'
val a2 = 97
val a3 = "a"[1]
val a4 = s2cp("a", of=1)
val a5 = [a1, a2, a3, a4]

writeln a1 == a2
writeln a2 == a3
writeln a3 == a4
writeln "numbers: ", join(map([a1, a2, a3, a4, a5], by=string), by=", ")
writeln "letters: ", join(map([a1, a2, a3, a4, a5], by=cp2s), by=", ")