def who_eats_who(zoo):
    endlist = [zoo]
    zoo = zoo.split(",")
    eatings = {"antelope":'grass','big-fish':'little-fish', 'bug':'leaves','bear':'big-fish, bug, chicken, cow, leaves, sheep',
               'chicken':'bug',
               'cow':'grass',
               'fox':'chicken, sheep',
               'giraffe':'leaves',
               'lion':'antelope, cow',
               'panda':'leaves',
               'sheep':'grass'}
    for i in zoo:
        noeat = False
        print(i)
        print(zoo)
        while noeat == False:
            if zoo.index(i) == 0:
                if zoo[1] in eatings[i]:
                    s = i + " eats " + zoo[1]
                    endlist.append(s)
                    zoo.pop(zoo[1])
                else:
                    noeat= True
            else:
                 if zoo[zoo.index(i)-1] in eatings[i]:
                    s = i + " eats " + zoo[zoo.index(i)-1]
                    endlist.append(s)
                    del zoo[zoo.index(i)-1]
                 elif zoo[zoo.index(i)+1] in eatings[i]:
                    s = i + " eats " + zoo[zoo.index(i)+1]
                    endlist.append(s)
                    del zoo[zoo.index(i)+1]
                 else:
                    noeat= True

    return endlist