I:~;R:(%I,0,0);.%(I+R),0,(&R+1)*(&I=1);D:"@\"I:\\\"\"+|(%I,1,&I)+\"\\\";R:\\\"\"+|(%I,0,1)+|R+\"\\\";.%(I+R),0,(&R+1)*(&I=1);D:\\\"\"+|D+\"\\\";\"+%D,0,&D*(&I>1)";@"I:\""+|(%I,1,&I)+"\";R:\""+|(%I,0,1)+|R+"\";.%(I+R),0,(&R+1)*(&I=1);D:\""+|D+"\";"+%D,0,&D*(&I>1)