Buggy python submission (verdict: Time Limit Exceeded):
import sys
import numpy as np


def main():
    x, y, z, k = [int(n) for n in input().split()]
    va = np.array(sorted([int(n) for n in input().split()], reverse=True))[:, np.newaxis]
    vb = np.array(sorted([int(n) for n in input().split()], reverse=True))[np.newaxis, :]
    xy = min(x*y, k)
    vac = np.array(sorted((va + vb).reshape(-1), reverse=True)[:xy]).reshape(xy, 1)
    vc = np.array(sorted([int(n) for n in input().split()], reverse=True))[np.newaxis, :]
    xyz = min(x*y*z, k)
    print(*(sorted((vac + vc).reshape(-1), reverse=True)[:xyz]), sep="\n")


main()


Fixed submission:
import sys


def main():
    x, y, z, k = [int(n) for n in input().split()]
    va = sorted([int(n) for n in input().split()], reverse=True)
    vb = sorted([int(n) for n in input().split()], reverse=True)
    xy = min(x*y, k)
    vab = (sorted([a + b for a in va for b in vb], reverse=True))[:xy]
    vc = sorted([int(n) for n in input().split()], reverse=True)
    xyz = min(x*y*z, k)
    print(*((sorted([ab + c for ab in vab for c in vc], reverse=True))[:xyz]), sep="\n")


main()

Buggy python submission (verdict: Time Limit Exceeded):
import sys
import numpy as np


def main():
    x, y, z, k = [int(n) for n in input().split()]
    a = sorted([int(n) for n in input().split()], reverse=True)
    b = sorted([int(n) for n in input().split()], reverse=True)
    c = sorted([int(n) for n in input().split()], reverse=True)
    result = [a[ai] + b[bi] + c[ci]
              for ai in range(x) for bi in range(y) for ci in range(z)
              if (ai + 1) * (bi + 1) * (ci + 1) <= k]
    print(*(sorted(result, reverse=True))[:k], sep="\n")


main()


Fixed submission:
import sys


def main():
    x, y, z, k = [int(n) for n in input().split()]
    va = sorted([int(n) for n in input().split()], reverse=True)
    vb = sorted([int(n) for n in input().split()], reverse=True)
    xy = min(x*y, k)
    vab = (sorted([a + b for a in va for b in vb], reverse=True))[:xy]
    vc = sorted([int(n) for n in input().split()], reverse=True)
    xyz = min(x*y*z, k)
    print(*((sorted([ab + c for ab in vab for c in vc], reverse=True))[:xyz]), sep="\n")


main()

Buggy python submission (verdict: Time Limit Exceeded):
import sys
import numpy as np


def main():
    x, y, z, k = [int(n) for n in input().split()]
    a = sorted([int(n) for n in input().split()], reverse=True)
    b = sorted([int(n) for n in input().split()], reverse=True)
    c = sorted([int(n) for n in input().split()], reverse=True)
    result = [a[ai] + b[bi] + c[ci] for ai in range(x) for bi in range(y) for ci in range(z) if ai * bi * ci <= k]
    print(*(sorted(result, reverse=True))[:k], sep="\n")


main()


Fixed submission:
import sys


def main():
    x, y, z, k = [int(n) for n in input().split()]
    va = sorted([int(n) for n in input().split()], reverse=True)
    vb = sorted([int(n) for n in input().split()], reverse=True)
    xy = min(x*y, k)
    vab = (sorted([a + b for a in va for b in vb], reverse=True))[:xy]
    vc = sorted([int(n) for n in input().split()], reverse=True)
    xyz = min(x*y*z, k)
    print(*((sorted([ab + c for ab in vab for c in vc], reverse=True))[:xyz]), sep="\n")


main()

Buggy python submission (verdict: Runtime Error):
import sys
import numpy as np


def main():
    x, y, z, k = [int(n) for n in input().split()]
    a = sorted([int(n) for n in input().split()], reverse=True)
    b = sorted([int(n) for n in input().split()], reverse=True)
    c = sorted([int(n) for n in input().split()], reverse=True)
    va = np.array(a)[:, np.newaxis, np.newaxis]
    vb = np.array(b)[np.newaxis, :, np.newaxis]
    vc = np.array(c)[np.newaxis, np.newaxis, :]
    vx = np.arange(1, x + 1)[:, np.newaxis, np.newaxis]
    vy = np.arange(1, y + 1)[np.newaxis, :, np.newaxis]
    vz = np.arange(1, z + 1)[np.newaxis, np.newaxis, :]
    print(*(sorted((va + vb + vc)[(vx * vy * vz) <= k], reverse=True))[:k], sep="\n")


main()


Fixed submission:
import sys


def main():
    x, y, z, k = [int(n) for n in input().split()]
    va = sorted([int(n) for n in input().split()], reverse=True)
    vb = sorted([int(n) for n in input().split()], reverse=True)
    xy = min(x*y, k)
    vab = (sorted([a + b for a in va for b in vb], reverse=True))[:xy]
    vc = sorted([int(n) for n in input().split()], reverse=True)
    xyz = min(x*y*z, k)
    print(*((sorted([ab + c for ab in vab for c in vc], reverse=True))[:xyz]), sep="\n")


main()