import re
import pandas as pd


def lc(l1: list):
    """For input list l1 of integers, return list of elements
    whose square is less than sum of all elements"""

    return None


def nlc(l1: list, l2: list):
    """For input lists l1, l2, return a list of elements common
    to both l1 and l2."""

    return None


def dc(l1: list):
    """For input list l1 of integers, return a dictionary with
    keys from l1, and values are squares of keys"""

    return None


if __name__ == "__main__":
    l1 = [1, 2, 3, 4]
    l2 = [2, 4, 6, 8]

    print("Inputs:")
    print(f"l1: {l1}")
    print(f"l2: {l2}")
    print("\n-------------------\n")

    print("lc:")
    print(lc(l2))
    print("\n-------------------\n")

    print("nlc:")
    print(nlc(l1, l2))
    print("\n-------------------\n")

    print("dc:")
    print(dc(l1))
    print("\n-------------------\n")