Below is a list of potential QWERTY keyboard 'typos' (typing mistakes) for the phrase 'past', from the free online typo generator. Enter another phrase to see possible typing errors, or select from one of the "top typos" charts.
Original
past
Transposition0
apst
psat
pats
Transposition1
sapt
ptsa
Transposition2
tasp
Transposition2r
tsap
Transposition0x2
apts
Slip3A
aspt
psta
Slip3B
spat
ptas
Omission
ast
pst
pat
pas
Repetition
ppast
paast
passt
pastt
QWERTY Substitution
oast
psst
paat
padt
pasr
pasy
QWERTY Repetition after
poast
passt
pasat
pasdt
pastr
pasty
QWERTY Repetition before
opast
psast
paast
padst
pasrt
pasyt
QWERTY Substitution Transposed
aost
osat
oats
spst
psts
apat
pata
apdt
pdat
patd
apsr
psar
pars
apsy
psay
pays
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
$sortKeys
$stringify
$stringifySafe
$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