Below is a list of potential QWERTY keyboard 'typos' (typing mistakes) for the phrase 'coupons', from the free online typo generator. Enter another phrase to see possible typing errors, or select from one of the "top typos" charts.
Original
coupons
Transposition0
ocupons
cuopons
copuons
couopns
coupnos
couposn
Transposition1
uocpons
cpuoons
coopuns
counops
coupsno
Transposition2
poucons
conpous
cousonp
Transposition2r
puocons
copuons
conopus
cousnop
Transposition0x2
ocpuons
ocuopns
ocupnos
ocuposn
cuoopns
cuopnos
cuoposn
copunos
copuosn
couopsn
Slip3A
oucpons
cupoons
copouns
couonps
coupnso
Slip3B
ucopons
cpouons
cooupns
counpos
coupson
Omission
oupons
cupons
copons
couons
coupns
coupos
coupon
Repetition
ccoupons
cooupons
couupons
couppons
coupoons
couponns
couponss
QWERTY Substitution
xoupons
voupons
ciupons
cpupons
coypons
coipons
couoons
coupins
couppns
coupobs
coupoms
coupona
coupond
QWERTY Repetition after
cxoupons
cvoupons
coiupons
copupons
couypons
couipons
coupoons
coupoins
coupopns
couponbs
couponms
couponsa
couponsd
QWERTY Repetition before
xcoupons
vcoupons
cioupons
cpoupons
coyupons
coiupons
couopons
coupions
couppons
coupobns
coupomns
couponas
couponds
QWERTY Substitution Transposed
oxupons
xuopons
xopuons
xouopns
xoupnos
xouposn
ovupons
vuopons
vopuons
vouopns
voupnos
vouposn
icupons
cuipons
cipuons
ciuopns
ciupnos
ciuposn
pcupons
cuppons
cppuons
cpuopns
cpupnos
cpuposn
ocypons
cyopons
copyons
coyopns
coypnos
coyposn
ocipons
ciopons
copions
coiopns
coipnos
coiposn
ocuoons
cuooons
coouons
couonos
couoosn
ocupins
cuopins
copuins
couipns
coupnis
coupisn
ocuppns
cuoppns
copupns
coupnps
couppsn
ocupobs
cuopobs
copuobs
couopbs
coupbos
couposb
ocupoms
cuopoms
copuoms
couopms
coupmos
couposm
ocupona
cuopona
copuona
couopna
coupnoa
coupoan
ocupond
cuopond
copuond
couopnd
coupnod
coupodn
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
$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