Position: 0

Read: 97i8
Position: 1

Seek: +1
Position: 2

Read: 99i8
Position: 3

Put back: -128i8
Position: 2

Read: -128i8
Position: 3

Read: 10i8
Position: 4

Read: eof
Position: 4

Put back: 127i8
Position: 3

Seek: -2
Position: 1

Read: 98i8
Position: 2