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

writeln .a1 == .a2
writeln .a2 == .a3
writeln .a3 == .a4
writeln "numbers: ", join ", ", [.a1, .a2, .a3, .a4, .a5]
writeln "letters: ", join ", ", map cp2s, [.a1, .a2, .a3, .a4, .a5]