Expression 19: "S" equals "b" to "b" plus StartFraction, 1 Over "D" , EndFraction , "B" to "B" .join left parenthesis, left parenthesis, "b" , "I" left parenthesis, "D" plus floor left parenthesis, mod left parenthesis, "D" "b" , "D" , right parenthesis , right parenthesis , "b" , right parenthesis , right parenthesis , right parenthesisS=b→b+1D,B→B.joinb,ID+floormodDb,D,b
19
Expression 20: left parenthesis, "O" , "I" left parenthesis, "D" plus floor left parenthesis, mod left parenthesis, "D" "O" , "D" , right parenthesis , right parenthesis , "O" , right parenthesis , right parenthesisO,ID+floormodDO,D,O
20
Expression 21: left parenthesis, "O" , 0 , right parenthesisO,0