N=list(input())
if "3" in N:
    mk=N.index("3")
    N[mk]="2"
    for i in range(mk+1,len(N)):
        N[i]="9"
sm=0
for n in N:
    sm+=int(n)
if sm%3==0:
    i=-1
    while N[i]=="0":
        N[i]="9"
        i-=1
    N[i]=str(int(N[i])-1)
print("".join(N))