# Copyright 2021 Christian Ulrich
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# usage: ./part1 < input

import strutils

const UniqueDigitSegments: array[4, int] = [
  2, # one
  4, # four
  3, # seven
  7, # eight
]

proc countUniqueOutputs(): int =
  var line = ""
  while readLine(stdin, line):
    let parts = line.split('|', 1)
    if parts.len() != 2:
      raise newException(ValueError, "invalid line")
    let outputs = parts[1].splitWhitespace()
    if outputs.len() != 4:
      raise newException(ValueError, "invalid output values")
    for output in outputs:
      if output.len() in UniqueDigitSegments:
        result.inc()

proc main(): int =
  try:
    echo countUniqueOutputs()
  except Exception as error:
    echo error.msg
    result = -1

when isMainModule:
  quit(main())