#!/usr/bin/env python3

# XXX: This solution is totally not scalable, and could
# EASILY use the solution to pt B for a faster solution.
# I'm keeping it for posterity to show that I brute forced
# pt A :)
import sys

fish = []

def repro(fish):
    new = []
    for f in fish:
        if f == 0:
            new += [6, 8]
        else:
            new.append(f - 1)

    return new

for l in sys.stdin:
    # just keep the last one (only one)
    fish = [int(x) for x in l.split(',')]

for i in range(80):
    fish = repro(fish)

print(len(fish))