import sys
input = sys.stdin.readline

LIST=[[[0,1,2,4,5,6],[3,4,5,6]],
      [[2,5],[1,4]],
      [[0,2,3,4,6]],
      [[0,2,3,5,6]],
      [[1,2,3,5]],
      [[0,1,3,5,6]],
      [[0,1,3,4,5,6],[1,3,4,5,6]],
      [[0,2,5],[0,1,2,5]],
      [[]],
      [[0,1,2,3,5,6],[0,1,2,3,5]]
      ]

def calc(S):
    NOW=[[0]*7]
    NNOW=[]

    for now in NOW:
        now2=[now]
        for s in S:
            #print(s)
            now3=[]
            for nowl in now2:
                #print(nowl)
                
                for ll in LIST[int(s)]:
                    ni=nowl[:]
                    for x in ll:
                        ni[x]+=1
                    now3.append(ni[:])

            now3.sort()
            now2=[]
            for x in now3:
                if now2 and now2[-1]==x:
                    continue
                now2.append(x)
            #print(now2)
        NNOW+=now2

    #print(NNOW)

    for x in NNOW:
        if len(set(x))==1:
            return True
    return False


N=int(input())

for i in range(N,10**18+20):
    if calc(str(i))==True:
        print(i)
        break