Below is a list of potential QWERTY keyboard 'typos' (typing mistakes) for the phrase 'tesco', from the free online typo generator. Enter another phrase to see possible typing errors, or select from one of the "top typos" charts.
Original
tesco
Transposition0
etsco
tseco
tecso
tesoc
Transposition1
setco
tcseo
teocs
Transposition2
cesto
tosce
Transposition2r
cseto
tocse
Transposition0x2
etcso
etsoc
tseoc
Slip3A
estco
tsceo
tecos
Slip3B
steco
tceso
teosc
Omission
esco
tsco
teco
teso
tesc
Repetition
ttesco
teesco
tessco
tescco
tescoo
QWERTY Substitution
resco
yesco
twsco
trsco
teaco
tedco
tesxo
tesvo
tesci
tescp
QWERTY Repetition after
tresco
tyesco
tewsco
tersco
tesaco
tesdco
tescxo
tescvo
tescoi
tescop
QWERTY Repetition before
rtesco
ytesco
twesco
tresco
teasco
tedsco
tesxco
tesvco
tescio
tescpo
QWERTY Substitution Transposed
ersco
rseco
recso
resoc
eysco
yseco
yecso
yesoc
wtsco
tswco
twcso
twsoc
rtsco
tsrco
trcso
trsoc
etaco
taeco
tecao
teaoc
etdco
tdeco
tecdo
tedoc
etsxo
tsexo
texso
tesox
etsvo
tsevo
tevso
tesov
etsci
tseci
tecsi
tesic
etscp
tsecp
tecsp
tespc
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