Sanalista

c = int(input())
l = []
l3 = []
a = 0
for t in range(c):
    l.append(input())
for i in range(c):
    s = sorted(l[i])
    l3.append(s)
    for j in range(0, 30, 2):
        if len(s)-2 < j:
            break
        if s[j] != s[j+1]:
            break
        if j == len(s) - 2:
            a += 1
        pass
print(a)

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED