a = input()
dic = {}
lst = []
for i in a:
if i not in dic:
dic[i] = 1
else:
dic[i] += 1
min_value = min(dic.values())
for c in a:
if dic[c] != min_value:
lst.append(c)
print(''.join(lst))
dic = {}
lst = []
for i in a:
if i not in dic:
dic[i] = 1
else:
dic[i] += 1
min_value = min(dic.values())
for c in a:
if dic[c] != min_value:
lst.append(c)
print(''.join(lst))