Below is a list of potential QWERTY keyboard 'typos' (typing mistakes) for the phrase 'paper', from the free online typo generator. Enter another phrase to see possible typing errors, or select from one of the "top typos" charts.
Original
paper
Transposition0
apper
ppaer
paepr
papre
Transposition1
pepar
parep
Transposition2
eappr
prpea
Transposition2r
epapr
prepa
Transposition0x2
apepr
appre
ppare
Slip3A
apper
ppear
paerp
Slip3B
ppaer
peapr
parpe
Omission
aper
pper
paer
papr
pape
Repetition
ppaper
paaper
papper
papeer
paperr
QWERTY Substitution
oaper
psper
paoer
papwr
paprr
papee
papet
QWERTY Repetition after
poaper
pasper
papoer
papewr
paperr
papere
papert
QWERTY Repetition before
opaper
psaper
paoper
papwer
paprer
papeer
papetr
QWERTY Substitution Transposed
aoper
opaer
oaepr
oapre
spper
ppser
psepr
pspre
apoer
poaer
paeor
paore
appwr
ppawr
pawpr
paprw
apprr
pparr
parpr
appee
ppaee
paepe
appet
ppaet
paept
papte
WrongDoubles
$JSON
$address
$applyDefault
$clone
$commas
$copy
$copyFields
$delete
$entries
$expand
$filt
$getType
$isArray
$isBoolean
$isClass
$isDate
$isElement
$isFunction
$isNumber
$isObject
$isString
$isType
$isValidDate
$json2txt
$keys
$load
$matchall
$parseFloats
$pick
$postJSON
$prune
$save
$set
$sortBy
$stringify
$sum
$svgPoster1
$table
$textify
$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