pump-back method

space

U+0020

hyphen-minus

U+002D

latin small letter a

U+0061

latin small letter b

U+0062

latin small letter c

U+0063

latin small letter d

U+0064

latin small letter e

U+0065

latin small letter h

U+0068

latin small letter k

U+006B

latin small letter m

U+006D

latin small letter o

U+006F

latin small letter p

U+0070

latin small letter t

U+0074

latin small letter u

U+0075