Sanalista

c = int(input())
l = []
a = 0
for i in range(c):
    b = input()
    l2 = []
    l2[:0] = b
    l2 = (sorted(l2))
    for j in range(0, len(l2), 2):
        if l2[j] != l2[j+1]:
            break
        if j == len(l2) - 2:
            a += 1
print(a)

Test 1

Verdict: ACCEPTED

Test 2

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 10, in <module>
    if l2[...

Test 3

Verdict: RUNTIME ERROR

Traceback (most recent call last):
  File "input/code.py", line 10, in <module>
    if l2[...