Buggy python submission (verdict: Runtime Error):
xyzk_, a_, b_, c_ = [input() for _ in range(4)]

x, y, z, k = [int(w) for w in xyzk_.split()]
a_nums = [int(n) for n in a_.split()]
b_nums = [int(n) for n in b_.split()]
c_nums = [int(n) for n in c_.split()]

a_nums.sort(reverse=True)
b_nums.sort(reverse=True)
c_nums.sort(reverse=True)

p, q, r = 0, 0, 0
now = a_nums[p] + b_nums[q] + c_nums[r]

while (p + 1) * (q + 1) * (r + 1) < k:
    pp = a_nums[p + 1] + b_nums[q] + c_nums[r]
    qq = a_nums[p] + b_nums[q + 1] + c_nums[r]
    rr = a_nums[p] + b_nums[q] + c_nums[r + 1]
    if pp >= max(qq, rr):
        p += 1
    elif qq >= rr:
        q += 1
    else:
        r += 1

a_nums = a_nums[:p + 1]
b_nums = b_nums[:q + 1]
c_nums = c_nums[:r + 1]
sums = []
for a in a_nums:
    for b in b_nums:
        for c in c_nums:
            sums.append(a + b + c)

sums.sort(reverse=True)

for n in sums[:k]:
    print(n)


Fixed submission:
xyzk_, *nums_ = [input() for _ in range(4)]

*le, k = [int(w) for w in xyzk_.split()]
abc = [sorted((int(n) for n in w.split()), reverse=True) for w in nums_]

p = [0, 0, 0]
pool = [0, sum(abc[i][p[0]] for i in range(3))]
for _ in range(k):
    max_pool = max(pool)
    max_t = 0
    for i in range(3):
        if p[i] + 1 == le[i]:
            continue
        t = abc[i][p[i] + 1] + abc[(i + 1) % 3][0] + abc[(i + 2) % 3][0]
        if t > max_t:
            max_t = t
            max_3 = i
    if max_pool < max_t:
        p[max_3] = min(p[max_3] + 1, le[max_3] - 1)
        j, k = (max_3 + 1) % 3, (max_3 + 2) % 3
        for n1 in abc[j][:p[j] + 1]:
            for n2 in abc[k][:p[k] + 1]:
                pool.append(n1 + n2 + abc[max_3][p[max_3]])
    print(pool.pop(pool.index(max(pool))))

Buggy python submission (verdict: Runtime Error):
xyzk_, a_, b_, c_ = [input() for _ in range(4)]

x, y, z, k = [int(w) for w in xyzk_.split()]
a_nums = [int(n) for n in a_.split()]
b_nums = [int(n) for n in b_.split()]
c_nums = [int(n) for n in c_.split()]

a_nums.sort(reverse=True)
b_nums.sort(reverse=True)
c_nums.sort(reverse=True)

p, q, r = 0, 0, 0
now = a_nums[p] + b_nums[q] + c_nums[r]

while (p+1) * (q+1) * (r+1) < k:
    if a_nums[p+1] >= max(b_nums[q+1], c_nums[r+1]):
        p += 1
    elif b_nums[q + 1] >= c_nums[r + 1]:
        q += 1
    else:
        r += 1

a_nums = a_nums[:p]
b_nums = b_nums[:q]
c_nums = c_nums[:r]


sums = []
for a in a_nums:
    for b in b_nums:
        for c in c_nums:
            sums.append(a + b + c)

sums.sort(reverse=True)
for n in sums[:k]:
    print(n)


Fixed submission:
xyzk_, *nums_ = [input() for _ in range(4)]

*le, k = [int(w) for w in xyzk_.split()]
abc = [sorted((int(n) for n in w.split()), reverse=True) for w in nums_]

p = [0, 0, 0]
pool = [0, sum(abc[i][p[0]] for i in range(3))]
for _ in range(k):
    max_pool = max(pool)
    max_t = 0
    for i in range(3):
        if p[i] + 1 == le[i]:
            continue
        t = abc[i][p[i] + 1] + abc[(i + 1) % 3][0] + abc[(i + 2) % 3][0]
        if t > max_t:
            max_t = t
            max_3 = i
    if max_pool < max_t:
        p[max_3] = min(p[max_3] + 1, le[max_3] - 1)
        j, k = (max_3 + 1) % 3, (max_3 + 2) % 3
        for n1 in abc[j][:p[j] + 1]:
            for n2 in abc[k][:p[k] + 1]:
                pool.append(n1 + n2 + abc[max_3][p[max_3]])
    print(pool.pop(pool.index(max(pool))))

Buggy python submission (verdict: Runtime Error):
xyzk_, a_, b_, c_ = [input() for _ in range(4)]

x, y, z, k = [int(w) for w in xyzk_.split()]
a_nums = [int(n) for n in a_.split()]
b_nums = [int(n) for n in b_.split()]
c_nums = [int(n) for n in c_.split()]

a_nums.sort(reverse=True)
b_nums.sort(reverse=True)
c_nums.sort(reverse=True)

p, q, r = 0, 0, 0
now = a_nums[p] + b_nums[q] + c_nums[r]

while (p+1) * (q+1) * (r+1) < k:
    if a_nums[p+1] >= max(b_nums[q+1], c_nums[r+1]):
        p += 1
    elif b_nums[q + 1] >= c_nums[r + 1]:
        q += 1
    else:
        r += 1

a_nums = a_nums[:p]
b_nums = b_nums[:q]
c_nums = c_nums[:r]

sums.sort(reverse=True)

sums = []
for a in a_nums:
    for b in b_nums:
        for c in c_nums:
            sums.append(a + b + c)

for n in sums[:k]:
    print(n)


Fixed submission:
xyzk_, *nums_ = [input() for _ in range(4)]

*le, k = [int(w) for w in xyzk_.split()]
abc = [sorted((int(n) for n in w.split()), reverse=True) for w in nums_]

p = [0, 0, 0]
pool = [0, sum(abc[i][p[0]] for i in range(3))]
for _ in range(k):
    max_pool = max(pool)
    max_t = 0
    for i in range(3):
        if p[i] + 1 == le[i]:
            continue
        t = abc[i][p[i] + 1] + abc[(i + 1) % 3][0] + abc[(i + 2) % 3][0]
        if t > max_t:
            max_t = t
            max_3 = i
    if max_pool < max_t:
        p[max_3] = min(p[max_3] + 1, le[max_3] - 1)
        j, k = (max_3 + 1) % 3, (max_3 + 2) % 3
        for n1 in abc[j][:p[j] + 1]:
            for n2 in abc[k][:p[k] + 1]:
                pool.append(n1 + n2 + abc[max_3][p[max_3]])
    print(pool.pop(pool.index(max(pool))))

Buggy python submission (verdict: Runtime Error):
xyzk_, a_, b_, c_ = [input() for _ in range(4)]

x, y, z, k = [int(w) for w in xyzk_.split()]
a_nums = [int(n) for n in a_.split()]
b_nums = [int(n) for n in b_.split()]
c_nums = [int(n) for n in c_.split()]

a_nums.sort(reverse=True)
b_nums.sort(reverse=True)
c_nums.sort(reverse=True)

p, q, r = 0, 0, 0
now = a_nums[p] + b_nums[q] + c_nums[r]

for (p+1) * (q+1) * (r+1) < k:
    print(a_nums[p] + b_nums[q] + c_nums[r])
    if a_nums[p+1] >= max(b_nums[q+1], c_nums[r+1]):
        p += 1
    elif b_nums[q + 1] >= c_nums[r + 1]:
        q += 1
    else:
        r += 1

a_nums = a_nums[:p]
b_nums = b_nums[:q]
c_nums = c_nums[:r]

sums.sort(reverse=True)

sums = []
for a in a_nums:
    for b in b_nums:
        for c in c_nums:
            sums.append(a + b + c)

for n in sums[:k]:
    print(n)


Fixed submission:
xyzk_, *nums_ = [input() for _ in range(4)]

*le, k = [int(w) for w in xyzk_.split()]
abc = [sorted((int(n) for n in w.split()), reverse=True) for w in nums_]

p = [0, 0, 0]
pool = [0, sum(abc[i][p[0]] for i in range(3))]
for _ in range(k):
    max_pool = max(pool)
    max_t = 0
    for i in range(3):
        if p[i] + 1 == le[i]:
            continue
        t = abc[i][p[i] + 1] + abc[(i + 1) % 3][0] + abc[(i + 2) % 3][0]
        if t > max_t:
            max_t = t
            max_3 = i
    if max_pool < max_t:
        p[max_3] = min(p[max_3] + 1, le[max_3] - 1)
        j, k = (max_3 + 1) % 3, (max_3 + 2) % 3
        for n1 in abc[j][:p[j] + 1]:
            for n2 in abc[k][:p[k] + 1]:
                pool.append(n1 + n2 + abc[max_3][p[max_3]])
    print(pool.pop(pool.index(max(pool))))

Buggy python submission (verdict: Time Limit Exceeded):
xyzk_, a_, b_, c_ = [input() for _ in range(4)]

x, y, z, k = [int(w) for w in xyzk_.split()]
a_nums = [int(n) for n in a_.split()]
b_nums = [int(n) for n in b_.split()]
c_nums = [int(n) for n in c_.split()]

sums = []
for a in a_nums:
    for b in b_nums:
        for c in c_nums:
            sums.append(a + b + c)

sums.sort(reverse=True)

for n in sums[:k]:
    print(n)


Fixed submission:
xyzk_, *nums_ = [input() for _ in range(4)]

*le, k = [int(w) for w in xyzk_.split()]
abc = [sorted((int(n) for n in w.split()), reverse=True) for w in nums_]

p = [0, 0, 0]
pool = [0, sum(abc[i][p[0]] for i in range(3))]
for _ in range(k):
    max_pool = max(pool)
    max_t = 0
    for i in range(3):
        if p[i] + 1 == le[i]:
            continue
        t = abc[i][p[i] + 1] + abc[(i + 1) % 3][0] + abc[(i + 2) % 3][0]
        if t > max_t:
            max_t = t
            max_3 = i
    if max_pool < max_t:
        p[max_3] = min(p[max_3] + 1, le[max_3] - 1)
        j, k = (max_3 + 1) % 3, (max_3 + 2) % 3
        for n1 in abc[j][:p[j] + 1]:
            for n2 in abc[k][:p[k] + 1]:
                pool.append(n1 + n2 + abc[max_3][p[max_3]])
    print(pool.pop(pool.index(max(pool))))