Below is a list of potential QWERTY keyboard 'typos' (typing mistakes) for the phrase 'allen', from the free online typo generator. Enter another phrase to see possible typing errors, or select from one of the "top typos" charts.
Original
allen
Transposition0
lalen
aleln
allne
Transposition1
llaen
aelln
alnel
Transposition2
ellan
anlel
Transposition2r
ellan
anell
Transposition0x2
laeln
lalne
allne
Slip3A
llaen
aleln
alenl
Slip3B
lalen
aelln
alnle
Omission
llen
alen
alln
alle
Repetition
aallen
alllen
alleen
allenn
QWERTY Substitution
sllen
aklen
alken
allwn
allrn
alleb
allem
QWERTY Repetition after
asllen
alklen
allken
allewn
allern
allenb
allenm
QWERTY Repetition before
sallen
akllen
alklen
allwen
allren
allebn
allemn
QWERTY Substitution Transposed
lslen
sleln
sllne
kalen
alken
akeln
aklne
laken
aklen
alekn
alkne
lalwn
alwln
allnw
lalrn
alrln
allnr
laleb
alelb
allbe
lalem
alelm
allme
WrongDoubles
aalen
aleen
$JSON
$address
$applyDefault
$clone
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$getType
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$isNumber
$isObject
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$isValidDate
$json2txt
$keys
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$matchall
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$toFixed
$type
$without
Glossary
Transposition = adjacent pairs of letters are swapped
Omission = individual letters are missed out
Repetition = individual letters are entered twice consecutively
QWERTY substitution = letters are replaced by each of their QWERTY-keyboard based physical neighbours (e.g. 'h' gets replaced with y, u, j, n, b, g)
QWERTY repetition type 1 = letters are followed by each of their QWERTY-keyboard neighbours
QWERTY repetition type 2 = letters are preceded by each of their QWERTY-keyboard neighbours