<> <> <> <<>> <<>> <> <<00 done>> <<01 doingLower>> <<10 doingUpper>> <<11 Invalid>> <<>> <> 0 0 60 1f 0 | xxxxxxxxx fedcba98 0 60 1f 0 | fffffffff 0 0 00 7f 1 | 01234567f 0 0 00 7f 1 | 1234567ff 0 0 00 7f 1 | 234567fff 0 0 00 7f 1 | 34567ffff 0 0 00 7f 1 | 4567fffff 0 0 00 7f 1 | 567ffffff 0 0 00 7f 1 | 67fffffff 0 0 00 7f 1 | 7ffffffff 0 0 00 7f 0 | fffffffff <> fedcba98 0 60 1f 0 | fffffffff 0 0 00 7f 2 | 01234567f 0 0 00 7f 2 | 01234567f 0 0 00 7f 2 | 01234567f 0 0 00 7f 2 | 01234567f 0 0 00 7f 2 | 01234567f 0 0 00 7f 2 | 01234567f 0 0 00 7f 2 | 01234567f 0 0 00 7f 2 | 01234567f 0 0 00 7f 0 | 01234567f .