2.py

import sys

input_list = []
count = 0

for line in sys.stdin:
    input_list.append(line)
    count += 1
    if count == 2:
        break
# y =
#
final = []
for x in input_list:
    x = x.split(",")
    # print(x)
    # x  = list(x)

    x[0], x[1] = x[1], x[0]
    final.append(x)

print(final)
# sys.stdout.write(str("".join(input_list)) + "\n")