# a = [[1,2],[3,4],[5,6]]
# list1 = [para for item in a for para in item]
# p = []
# for s in a:
#     for l in s:
#         p.append(l)
# print(p)


x = "abc"
y = "def"
z = ["d","e","f"]
m = x.join(y)
print(m)

