57PFNM5DCBR346EIO2FWBWKOSNRETLD26QOZJIBYOSRXAD27QLPAC
LXTTOB33N2HCUZFIUDRQGGBVHK2HODRG4NBLH6RXRQZDCHF27BSAC
function test_rfind() check_eq(rfind('abc', 'c'), 3, 'final char') check_eq(rfind('acbc', 'c', 3), 2, 'previous char') check_nil(rfind('abc', 'd'), 'missing char') check_nil(rfind('abc', 'c', 2), 'no more char')end
function test_rfind()
check_eq(rfind('abc', 'c'), 3, 'final char')
check_eq(rfind('acbc', 'c', 3), 2, 'previous char')
check_nil(rfind('abc', 'd'), 'missing char')
check_nil(rfind('abc', 'c', 2), 'no more char')
end