import java.util.*;

class HW3Q1 {
    public int position(List<String> lst, String s1, String s2) {
	/* Should return 0 if either s1 or s2 or both are not present in lst.
           Should return 1 if the first occurence of s1 is before the
           first occurence of s2; and -1 otherwise. Use an iterator.
	*/


	
    }
}