Below is a list of potential QWERTY keyboard 'typos' (typing mistakes) for the phrase 'barn', from the free online typo generator. Enter another phrase to see possible typing errors, or select from one of the "top typos" charts.
Original
barn
Transposition0
abrn
bran
banr
Transposition1
rabn
bnra
Transposition2
narb
Transposition2r
nrab
Transposition0x2
abnr
Slip3A
arbn
brna
Slip3B
rban
bnar
Omission
arn
brn
ban
bar
Repetition
bbarn
baarn
barrn
barnn
QWERTY Substitution
varn
narn
bsrn
baen
batn
barb
barm
QWERTY Repetition after
bvarn
bnarn
basrn
baren
bartn
barnb
barnm
QWERTY Repetition before
vbarn
nbarn
bsarn
baern
batrn
barbn
barmn
QWERTY Substitution Transposed
avrn
vran
vanr
anrn
nran
nanr
sbrn
brsn
bsnr
aben
bean
bane
abtn
btan
bant
abrb
brab
babr
abrm
bram
bamr
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