import math

highest_num = [0]*31

a = [int(_) for _ in input().split()]

for i in a:
    for k in range(32, 0, -1):
        if (i % 2**k == 0):
            highest_num[k] += 1

res = 0
for i in highest_num:
    if (i <= 1):
        continue
    res += math.comb(i, 2)
print(res)