%b=(1,{0,[0,1],1,[0,1,2]},2,{0,[0,1,3],1,[1,1,2]},3,{0,[1,-1,4],1,[1,1
,3]},4,{0,[0,-1,5],1,[1,-1,4]},5,{0,[(1)x3],1,[1,-1,5]}),($m,@t)=(1)x7