is='sIam=I'mare='re
isnot=isn't/iznt/arenot=aren't/a:nt/ donot=don't
doesnot=doesn't
was='s
didnot=didn't
cannot=can't
have='ve
has='s
havenot=haven't
hasnot=hasn't
will='ll
willnot=won't
shallnot=shan't
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