#!/usr/bin/env python3
import sys

# rather than keep a raw list, count number of each type!
counts = [0] * 9

for l in sys.stdin:
    for f in l.split(","):
        counts[int(f)] += 1

for i in range(256):
    ready = counts.pop(0)
    counts[6] += ready
    counts.append(ready)

print(sum(counts))