Below is a list of potential QWERTY keyboard 'typos' (typing mistakes) for the phrase 'nfl', from the free online typo generator. Enter another phrase to see possible typing errors, or select from one of the "top typos" charts.
Original
nfl
Transposition0
fnl
nlf
Transposition1
lfn
Transposition2
Transposition2r
Transposition0x2
Slip3A
fln
Slip3B
lnf
Omission
fl
nl
nf
Repetition
nnfl
nffl
nfll
QWERTY Substitution
bfl
mfl
ndl
ngl
nfk
QWERTY Repetition after
nbfl
nmfl
nfdl
nfgl
nflk
QWERTY Repetition before
bnfl
mnfl
ndfl
ngfl
nfkl
QWERTY Substitution Transposed
fbl
blf
fml
mlf
dnl
nld
gnl
nlg
fnk
nkf
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