gównoconcat

import sys
import uuid
import time

def my_concat(s1, s2):
    return s1.join(s2)

import sys
import time
import random

if __name__ == '__main__':
    n = 0
    a = b = ""
    start_time = time.time()
    for line in sys.stdin:
        line = str(line).split(" ")
        if len(line) != 2:
            continue
        a = str(line[0])
        b = str(line[1])

        c2 = my_concat(a, b)

        a = b = ""
        n += 1
    end_time = time.time() - start_time

    petla_start = time.time()
    h = n;
    for i in range(0, n):
        h+= 1;
        if h > random.randrange(6,9999):
            h+=2
    petla_end = time.time()

    total_time = end_time - (petla_end-petla_start)
    print("my concat total: " + str(total_time) + "\n")
    print("my concat avg: " + str(total_time/n) + "\n")
    print(str(h))