Below is a list of potential QWERTY keyboard 'typos' (typing mistakes) for the phrase 'drills', from the free online typo generator. Enter another phrase to see possible typing errors, or select from one of the "top typos" charts.
Original
drills
Transposition0
rdills
dirlls
drlils
drilsl
Transposition1
irdlls
dlirls
drllis
drisll
Transposition2
lridls
dlilrs
drslli
Transposition2r
lirdls
dllirs
drslli
Transposition0x2
rdlils
rdills
rdilsl
dirlls
dirlsl
drlisl
Slip3A
ridlls
dilrls
drllis
drilsl
Slip3B
idrlls
dlrils
drlils
drisll
Omission
rills
dills
drlls
drils
drill
Repetition
ddrills
drrills
driills
drillls
drillss
QWERTY Substitution
srills
frills
deills
dtills
drulls
drolls
drikls
drilks
drilla
drilld
QWERTY Repetition after
dsrills
dfrills
dreills
drtills
driulls
driolls
drilkls
drillks
drillsa
drillsd
QWERTY Repetition before
sdrills
fdrills
derills
dtrills
druills
droills
driklls
drilkls
drillas
drillds
QWERTY Substitution Transposed
rsills
sirlls
srlils
srilsl
rfills
firlls
frlils
frilsl
edills
diells
delils
deilsl
tdills
ditlls
dtlils
dtilsl
rdulls
durlls
drluls
drulsl
rdolls
dorlls
drlols
drolsl
rdikls
dirkls
drkils
drilks
driksl
rdilks
dirlks
drliks
drikls
drilsk
rdilla
dirlla
drlila
drilal
rdilld
dirlld
drlild
drildl
WrongDoubles
driils
drilss
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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