将语句：if a〉b then while d<e do d=d+1 else b=b-1,翻译成四元式序列

1,(j>,a,b, 3 ) 2,(j, , , 11 ) 3,(j<,d,e, 5) 4,(j, , , 8 ) 5,(+,d,1,t1) 6,(=,t1, ,d) 7,(j, , , 10 ) 8,(-,b,1,t2) 9,(=,t2, ,b) 10,(j, , , 3 ) 11,(if下一条)