Task: Sentence Ordering
Input (English): Steps: (1) The saliva breaks down the chemicals in the food a bit, which helps make the food mushy and easy to swallow (2) Your tongue helps out, pushing the food around while you chew with your teeth (3) The esophagus moves food from the back of your throat to your stomach (4) Strong muscles in the walls of the stomach and gastric juices break down food in your stomach  
Where does the following step fit into the given list of steps: Your stomach moves the food into the intestines to complete digestion 
Output (English):  After step 4.