package main

import (
  "bufio"
  "fmt"
  "os"
  "aoc2022/day06/common"
)

func main() {
  signal := common.Parse(*bufio.NewScanner(os.Stdin))
  index := 0

  for i := 14; i <= len(signal); i++ {
    set := make(map[rune]bool)
    for _, c := range signal[i-14:i] {
      set[c] = true
    }
    if len(set) == 14 {
      index = i
      break
    }
  }

  fmt.Println(index)
}