"""

https://yukicoder.me/problems/no/2233

全部偶数だったら、繰り返しそう？
実装適当なのでwa出そう

"""

import sys
from sys import stdin

TT = int(stdin.readline())

for loop in range(TT):

    a,b,c,K = map(int,stdin.readline().split())

    dic = {}

    dic[(a,b,c)] = 0
    lis = [a+b+c]

    for i in range(1,K+1):

        a,b,c = (b+c)//2 , (c+a)//2 , (a+b)//2
        lis.append(a+b+c)

        tup = (a,b,c)

        if i == K:
            print (a+b+c)
            break

        if tup in dic:
            rem = i - dic[tup]
            print (lis[dic[tup] + rem])
            break

        dic[tup] = i