Added 7 contraction as NUM+ALT+chord

NUM+ALT+d = ['d] - I'd, where'd
NUM+ALT+l = ['ll] - I'll
NUM+ALT+m = ['m] - I'm
NUM+ALT+r = ['re] - we're
NUM+ALT+s = ['s] - it's, let's
NUM+ALT+t = ['t] - don't, doesn’t, wouldn’t, can't, won't
NUM+ALT+v = ['ve] - I've