import times, strutils, sequtils, math, algorithm, tables, sets, lists, intsets
import critbits, future, strformat, deques
template `max=`(x,y) = x = max(x,y)
template `min=`(x,y) = x = min(x,y)
template `mod=`(x,y) = x = x mod y
template scan2 = (scan(), scan())
template scan3 = (scan(), scan())
let read* = iterator: string {.closure.} =
    while true: (for s in stdin.readLine.split: yield s)
proc scan(): int = read().parseInt
proc scanf(): float = read().parseFloat
proc toInt(c:char): int =
    return int(c) - int('0')



proc isCorrectAgariShapeInnner(hand:seq[int]):bool=
  var
    r:int
    a = hand[0]
    b = hand[1]
  for i in 0..<7:
    r = a.mod(3)
    if b>=r and hand[i+2]>=r:
      a = b-r
      b = hand[i+2]-r
    else:
      return false
  if a.mod(3)==0 and b.mod(3)==0:
    return true
  else:
    return false

proc isCorrectAgariShape(s:string):bool=
  result = false
  if s.anyIt(s.count(it)>=5):
    return false
  elif s.allIt(s.count(it)==2):
    return true
  else:
    var hand = newseq[int](9)
    for i in 1..9:
      hand[i-1] = s.count(($i)[0])
    for i in 0..8:
      if hand[i]>=2:
        var t = hand
        t[i]-=2
        result = result or t.isCorrectAgariShapeInnner
        
    

  


proc solve()=
  var
    s = read()
  for i in 1..9:
    if isCorrectAgariShape(s & $i):
      echo i
    
  
  
  
solve()