#!/usr/bin/env python3
"""Array intersection utility - returns sorted unique elements in both arrays."""

def array_intersection(arr1, arr2):
    """Return sorted list of unique elements present in both arrays."""
    return sorted(set(arr1) & set(arr2))

if __name__ == "__main__":
    import sys
    # Parse arrays from command line: python script.py "1 2 3" "2 3 4"
    if len(sys.argv) == 3:
        a1 = list(map(int, sys.argv[1].split()))
        a2 = list(map(int, sys.argv[2].split()))
        result = array_intersection(a1, a2)
        print(" ".join(map(str, result)))
    else:
        # Demo test case
        arr1 = [1, 2, 3, 4, 5]
        arr2 = [3, 4, 5, 6, 7]
        print(f"Intersection of {arr1} and {arr2}: {array_intersection(arr1, arr2)}")