import sys
input = sys.stdin.readline


S=input().strip()
LEN=len(S)
C=[0]*26
ANS=LEN
ind=-1

for s in S:
    C[ord(s)-65]+=1
    
for i in range(26):
    x=C[i]

    if ANS>LEN-x:
        ANS=LEN-x
        ind=[chr(i+65)]

x=LEN

for t in range(2,LEN):
    if x%t==0:
        while x%t==0:
            x//=t
        dis=LEN//t

        score=0
        L=[]

        for i in range(dis):
            C=[0]*26
            for j in range(t):
                C[ord(S[j*dis+i])-65]+=1
            MAX=0
            indm=""

            for j in range(26):
                if MAX<C[j]:
                    MAX=C[j]
                    indm=j
            score+=t-MAX
            L.append(chr(indm+65))

        if score<ANS:
            ANS=score
            ind=L
                
LANS=ind*(LEN//len(ind))

print("".join(LANS))