Below is a list of potential QWERTY keyboard 'typos' (typing mistakes) for the phrase 'block', from the free online typo generator. Enter another phrase to see possible typing errors, or select from one of the "top typos" charts.
Original
block
Transposition0
lbock
bolck
blcok
blokc
Transposition1
olbck
bcolk
blkco
Transposition2
clobk
bkocl
Transposition2r
colbk
bkcol
Transposition0x2
lbcok
lbokc
bolkc
Slip3A
lobck
boclk
blcko
Slip3B
oblck
bclok
blkoc
Omission
lock
bock
blck
blok
bloc
Repetition
bblock
bllock
bloock
blocck
blockk
QWERTY Substitution
vlock
nlock
bkock
blick
blpck
bloxk
blovk
blocj
blocl
QWERTY Repetition after
bvlock
bnlock
blkock
bloick
blopck
blocxk
blocvk
blockj
blockl
QWERTY Repetition before
vblock
nblock
bklock
bliock
blpock
bloxck
blovck
blocjk
bloclk
QWERTY Substitution Transposed
lvock
volck
vlcok
vlokc
lnock
nolck
nlcok
nlokc
kbock
bokck
bkcok
bkokc
lbick
bilck
blcik
blikc
lbpck
bplck
blcpk
blpkc
lboxk
bolxk
blxok
blokx
lbovk
bolvk
blvok
blokv
lbocj
bolcj
blcoj
blojc
lbocl
bolcl
blcol
blolc
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