import pandas as pd

# pd 2.1
s = pd.Series([18, 20, 15, 6, 9, 10, 20, 19, 17, 13, 16, 7, 14, 15, 20, 4, 12, 17, 19, 18])
print(s)

# pd 2.2
df = pd.DataFrame([[1, "a"],[2, "b"],[3, "c"]])
print(df)

# pd 2.1.3