Write a function merge(A, B, sep) to merge two lists of text strings A and B using the separator sep.

Use the docstring """Merges two lists of text strings using a separator sep""".

Do not change the main program. Expected output:

Beginning of WW1: 1914

End of WW1: 1918

Beginning of WW2: 1939

End of WW2: 1945

Beginning of Cold War: 1947

End of Cold War: 1991

# Main program (do not change): events = ["Beginning of WW1", "End of WW1", "Beginning of WW2", "End of WW2", "Beginning of Cold War", "End of Cold War"] years = ["1914", "1918", "1939", "1945", "1947", "1991"] merged = merge(events, years, ": ") for x in merged: print(x)