# https://www.globalsino.com/ICs/page4853.html
# Form a word and a number, and add the same symbol in betweeen

List1 = ['1','9','6','7'] 

# Add a dash in between two digits  
Dashed = "-"
Dashed = Dashed.join(List1)
print(Dashed)

# Add a dash in between two digits  
print("".join(List1))


# Form a word
List2 = ['Y','o','u','g', 'u', 'i'] 
print("".join(List2))