IKFZAKEUYS4IYV7EUM4SPRDSHRD7GTU75SLXIWOD4SYIFVIKOTCAC
YN63NUZO4LVJ7XPMURDULTXBVJKW5MVCTZ24R7Z52QMHO3HPDUVQC
SXEYMYF7P4RZMZ46WPL4IZUTSQ2ATBWYZX7QNVMS3SGOYXYOHAGQC
CCLLB7OIFNFYJZTG3UCI7536TOCWSCSXR67VELSB466R24WLJSDAC
while let Some(x) = self.iter.next() {
for x in self.iter.by_ref() {