Buggy python submission (verdict: Time Limit Exceeded):
def main():
  if 'get_ipython' not in globals():  
    # For Subsession
    X, Y, Z, K = (int(i) for i in input().split())
    A = [int(i) for i in input().split()] 
    B = [int(i) for i in input().split()]
    C = [int(i) for i in input().split()] 
  else:
    A = [1,10,100]
    B = [2,20,200]
    C = [1,10,100]
    #A = [4,6]
    #B = [1,5]
    #C = [3,8]
    X = len(A)
    Y = len(B)
    Z = len(C)
    K = 5
    #K = 8

  # Processing
  # A.sort(reverse=True)
  # B.sort(reverse=True)
  
  AB = []
  for i in A:
    for j in B:
      AB.append(i+j)
  
  AB.sort(reverse=True)
  #if 'get_ipython' in globals(): 
  #  print(AB)
  
  ABC = []
  C.sort(reverse=True)
  for i in AB[0:K]:
    for j in C[0:K]:
      ABC.append(i+j)  
  
  ABC.sort(reverse=True)
  
  #if 'get_ipython' in globals(): 
  #  print(ABC)

  for i in ABC[0:K]:
    print(i)      

main()

Fixed submission:
def main():
  if 'get_ipython' not in globals():  
    # For Subsession
    X, Y, Z, K = (int(i) for i in input().split())
    A = [int(i) for i in input().split()] 
    B = [int(i) for i in input().split()]
    C = [int(i) for i in input().split()] 
  else:
    A = [1,10,100]
    B = [2,20,200]
    C = [1,10,100]
    #A = [4,6]
    #B = [1,5]
    #C = [3,8]
    X = len(A)
    Y = len(B)
    Z = len(C)
    K = 5
    #K = 8

  # Processing
  AB = []
  A.sort(reverse=True)
  B.sort(reverse=True)
  for i in A[0:K]:
    for j in B[0:K]:
      AB.append(i+j)
  
  AB.sort(reverse=True)
  
  ABC = []
  C.sort(reverse=True)
  
  for i in AB[0:K]:
    for j in C[0:K]:
      ABC.append(i+j)  
  
  ABC.sort(reverse=True)

  for i in ABC[0:K]:
    print(i)      

main()

Buggy python submission (verdict: Time Limit Exceeded):
def main():
  if 'get_ipython' not in globals():  
    # For Subsession
    X, Y, Z, K = (int(i) for i in input().split())
    A = [int(i) for i in input().split()] 
    B = [int(i) for i in input().split()]
    C = [int(i) for i in input().split()] 
  else:
    A = [1,10,100]
    B = [2,20,200]
    C = [1,10,100]
    #A = [4,6]
    #B = [1,5]
    #C = [3,8]
    X = len(A)
    Y = len(B)
    Z = len(C)
    K = 5
    #K = 8

  # Processing
  # A.sort(reverse=True)
  # B.sort(reverse=True)
  
  AB = []
  for i in A:
    for j in B:
      AB.append(i+j)
  
  AB.sort(reverse=True)
  if 'get_ipython' in globals(): 
    print(AB)
  
  ABC = []
  C.sort(reverse=True)
  for i in AB[0:K]:
    for j in C[0:K]:
      ABC.append(i+j)  
  
  ABC.sort(reverse=True)
  
  if 'get_ipython' in globals(): 
    print(ABC)

  for i in ABC[0:K]:
    print(i)      

main()

Fixed submission:
def main():
  if 'get_ipython' not in globals():  
    # For Subsession
    X, Y, Z, K = (int(i) for i in input().split())
    A = [int(i) for i in input().split()] 
    B = [int(i) for i in input().split()]
    C = [int(i) for i in input().split()] 
  else:
    A = [1,10,100]
    B = [2,20,200]
    C = [1,10,100]
    #A = [4,6]
    #B = [1,5]
    #C = [3,8]
    X = len(A)
    Y = len(B)
    Z = len(C)
    K = 5
    #K = 8

  # Processing
  AB = []
  A.sort(reverse=True)
  B.sort(reverse=True)
  for i in A[0:K]:
    for j in B[0:K]:
      AB.append(i+j)
  
  AB.sort(reverse=True)
  
  ABC = []
  C.sort(reverse=True)
  
  for i in AB[0:K]:
    for j in C[0:K]:
      ABC.append(i+j)  
  
  ABC.sort(reverse=True)

  for i in ABC[0:K]:
    print(i)      

main()

Buggy python submission (verdict: Time Limit Exceeded):
def main():
  if 'get_ipython' not in globals():  
    # For Subsession
    X, Y, Z, K = (int(i) for i in input().split())
    A = [int(i) for i in input().split()] 
    B = [int(i) for i in input().split()]
    C = [int(i) for i in input().split()] 
  else:
    A = [1,10,100]
    B = [2,20,200]
    C = [1,10,100]
    #A = [4,6]
    #B = [1,5]
    #C = [3,8]
    X = len(A)
    Y = len(B)
    Z = len(C)
    K = 5
    #K = 8

  # Processing
  # A.sort(reverse=True)
  # B.sort(reverse=True)
  # C.sort(reverse=True)

  AB = []
  for i in A:
    for j in B:
      AB.append(i+j)
  
  AB.sort(reverse=True)
  if 'get_ipython' in globals(): 
    print(AB)
  
  ABC = []
  for i in AB[0:K]:
    for j in C:
      ABC.append(i+j)  
  
  ABC.sort(reverse=True)
  
  if 'get_ipython' in globals(): 
    print(ABC)

  for i in ABC[0:K]:
    print(i)      

main()

Fixed submission:
def main():
  if 'get_ipython' not in globals():  
    # For Subsession
    X, Y, Z, K = (int(i) for i in input().split())
    A = [int(i) for i in input().split()] 
    B = [int(i) for i in input().split()]
    C = [int(i) for i in input().split()] 
  else:
    A = [1,10,100]
    B = [2,20,200]
    C = [1,10,100]
    #A = [4,6]
    #B = [1,5]
    #C = [3,8]
    X = len(A)
    Y = len(B)
    Z = len(C)
    K = 5
    #K = 8

  # Processing
  AB = []
  A.sort(reverse=True)
  B.sort(reverse=True)
  for i in A[0:K]:
    for j in B[0:K]:
      AB.append(i+j)
  
  AB.sort(reverse=True)
  
  ABC = []
  C.sort(reverse=True)
  
  for i in AB[0:K]:
    for j in C[0:K]:
      ABC.append(i+j)  
  
  ABC.sort(reverse=True)

  for i in ABC[0:K]:
    print(i)      

main()

Buggy python submission (verdict: Time Limit Exceeded):
 # import sys  sys.exit()を使う時に必要

def main():
  if 'get_ipython' not in globals():  
    # For Subsession
    # N = int(input())
    X, Y, Z, K = (int(i) for i in input().split())
    A = [int(i) for i in input().split()] 
    B = [int(i) for i in input().split()]
    C = [int(i) for i in input().split()] 
    # S = [input() for _ in range(N)]  縦持ち／行数N
    # t = [0] * N  　　ti xi yi 縦持ち/行数N
    # x = [0] * N
    # y = [0] * N
    # for i in range(N):
    #   t[i], x[i], y[i] = map(int, input().split())
  else:
    #A = [1,10,100]
    #B = [2,20,200]
    #C = [1,10,100]
    A = [4,6]
    B = [1,5]
    C = [3,8]
    X = len(A)
    Y = len(B)
    Z = len(C)
    # K = 5
    K = 8

  ans = []
  # Processing
  A.sort(reverse=True)
  B.sort(reverse=True)
  C.sort(reverse=True)
      
  for i in A:
    if i >= A[min(K,X)-1]:
      for j in B:
        if j >= B[min(K,Y)-1] :
          for k in C:
            if k >= C[min(K,Z)-1]:
              ans.append(i+j+k)
            else:
              break
        else:
          break
    else:
      break
    
  ans.sort(reverse=True)
  if 'get_ipython' in globals(): 
    print(ans)

  for i in range(0,K):
    print(ans[i])      

main()

Fixed submission:
def main():
  if 'get_ipython' not in globals():  
    # For Subsession
    X, Y, Z, K = (int(i) for i in input().split())
    A = [int(i) for i in input().split()] 
    B = [int(i) for i in input().split()]
    C = [int(i) for i in input().split()] 
  else:
    A = [1,10,100]
    B = [2,20,200]
    C = [1,10,100]
    #A = [4,6]
    #B = [1,5]
    #C = [3,8]
    X = len(A)
    Y = len(B)
    Z = len(C)
    K = 5
    #K = 8

  # Processing
  AB = []
  A.sort(reverse=True)
  B.sort(reverse=True)
  for i in A[0:K]:
    for j in B[0:K]:
      AB.append(i+j)
  
  AB.sort(reverse=True)
  
  ABC = []
  C.sort(reverse=True)
  
  for i in AB[0:K]:
    for j in C[0:K]:
      ABC.append(i+j)  
  
  ABC.sort(reverse=True)

  for i in ABC[0:K]:
    print(i)      

main()

Buggy python submission (verdict: Runtime Error):
 # import sys  sys.exit()を使う時に必要

def main():
  if 'get_ipython' not in globals():  
    # For Subsession
    # N = int(input())
    X, Y, Z, K = input().split()
    A = [int(i) for i in input().split()] 
    B = [int(i) for i in input().split()]
    C = [int(i) for i in input().split()] 
    # S = [input() for _ in range(N)]  縦持ち／行数N
    # t = [0] * N  　　ti xi yi 縦持ち/行数N
    # x = [0] * N
    # y = [0] * N
    # for i in range(N):
    #   t[i], x[i], y[i] = map(int, input().split())
  else:
    A = [1,10,100]
    B = [2,20,200]
    C = [1,10,100]
    X = len(A)
    Y = len(B)
    Z = len(C)
    K = 5

  ans = []
  # Processing
  A.sort(reverse=True)
  B.sort(reverse=True)
  C.sort(reverse=True)
      
  for i in A:
    if i >= A[min(K,X)-1]:
      for j in B:
        if j >= B[min(K,Y)-1] :
          for k in C:
            if k >= C[min(K,Z)-1]:
              ans.append(i+j+k)
            else:
              break
        else:
          break
    else:
      break
    
  ans.sort(reverse=True)
  if 'get_ipython' in globals(): 
    print(ans)

  for i in range(0,K):
    print(ans[i])      

main()

Fixed submission:
def main():
  if 'get_ipython' not in globals():  
    # For Subsession
    X, Y, Z, K = (int(i) for i in input().split())
    A = [int(i) for i in input().split()] 
    B = [int(i) for i in input().split()]
    C = [int(i) for i in input().split()] 
  else:
    A = [1,10,100]
    B = [2,20,200]
    C = [1,10,100]
    #A = [4,6]
    #B = [1,5]
    #C = [3,8]
    X = len(A)
    Y = len(B)
    Z = len(C)
    K = 5
    #K = 8

  # Processing
  AB = []
  A.sort(reverse=True)
  B.sort(reverse=True)
  for i in A[0:K]:
    for j in B[0:K]:
      AB.append(i+j)
  
  AB.sort(reverse=True)
  
  ABC = []
  C.sort(reverse=True)
  
  for i in AB[0:K]:
    for j in C[0:K]:
      ABC.append(i+j)  
  
  ABC.sort(reverse=True)

  for i in ABC[0:K]:
    print(i)      

main()