H 3 ---- 2,1 2 3m;,,;; -2,.m7 . ++,+++m. -1,m. .-4m-2 -2m-1 1,2;3,4,$;5,6,7 ;.m0 u u +;m7 -m-6 +1m+4 -3m?all? /their/-m-2 # to be undone ,1m$ u ,w out.o