Below is a list of potential QWERTY keyboard 'typos' (typing mistakes) for the phrase 'class', from the free online typo generator. Enter another phrase to see possible typing errors, or select from one of the "top typos" charts.
Original
class
Transposition0
lcass
calss
clsas
Transposition1
alcss
csals
clssa
Transposition2
slacs
csasl
Transposition2r
salcs
cssal
Transposition0x2
lcsas
lcass
calss
Slip3A
lacss
casls
clssa
Slip3B
aclss
cslas
clsas
Omission
lass
cass
clss
clas
Repetition
cclass
cllass
claass
classs
QWERTY Substitution
xlass
vlass
ckass
clsss
claas
clads
clasa
clasd
QWERTY Repetition after
cxlass
cvlass
clkass
classs
clasas
clasds
classa
classd
QWERTY Repetition before
xclass
vclass
cklass
clsass
claass
cladss
clasas
clasds
QWERTY Substitution Transposed
lxass
xalss
xlsas
lvass
valss
vlsas
kcass
cakss
cksas
lcsss
cslss
lcaas
calas
clasa
lcads
calds
cldas
clasd
lcasa
calsa
clsaa
claas
lcasd
calsd
clsad
clads
WrongDoubles
claas
$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