﻿`` alpha := "abcdefghijklmnopqrstuvwxyz";
`` digits := "0123456789";
`` sn := null->ToText();
`` se := "";

sn[3]
se[3]

digits[3]
digits[3:7]
digits[3:7:2]
digits[::2]
digits[::3]
digits[::-1]
digits[::-2]
digits[::-3]

digits[27]
digits[27:]
digits[%27]
digits[&27]
digits[^%27]
digits[^&27]

alpha[:10]
alpha[:10:-1]
alpha[10::-1]
alpha[::2]
alpha[::25]
alpha[::26]

alpha[^10:]
alpha[:^10:-1]
