<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def contains (small, large):
 """ Returns true iff all elements of 'small' exist in 'large'. """

    small = to_seq (small)
    large = to_seq (large)

    for s in small:
        if not s in large:
            return False
    return True