apple
12345
01234


i = 4; i > 0; i--
temp += substring(3, 4) (l)

i = 3; i > 0; i--
temp += substring(2, 3) (p)

i = 2; i > 0; i--
temp += substring(1, 2) (p)


i = 1; i > 0; i--
temp += substring(0, 1) (a)

lppa