Below is a list of potential QWERTY keyboard 'typos' (typing mistakes) for the phrase 'safe', from the free online typo generator. Enter another phrase to see possible typing errors, or select from one of the "top typos" charts.
Original
safe
Transposition0
asfe
sfae
saef
Transposition1
fase
sefa
Transposition2
eafs
Transposition2r
efas
Transposition0x2
asef
Slip3A
afse
sfea
Slip3B
fsae
seaf
Omission
afe
sfe
sae
saf
Repetition
ssafe
saafe
saffe
safee
QWERTY Substitution
aafe
dafe
ssfe
sade
sage
safw
safr
QWERTY Repetition after
saafe
sdafe
sasfe
safde
safge
safew
safer
QWERTY Repetition before
asafe
dsafe
ssafe
sadfe
sagfe
safwe
safre
QWERTY Substitution Transposed
afae
aaef
adfe
dfae
daef
sfse
ssef
asde
sdae
saed
asge
sgae
saeg
asfw
sfaw
sawf
asfr
sfar
sarf
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