init = input().split()
def secWord(word):
return(word[1])
for i in range(len(init)):
ind = i
for j in range(i,len(init)):
if secWord(init[j]) < secWord(init[ind]):
ind = j
init[i], init[ind] = init[ind], init[i]
print(" ".join([str(i) for i in init]))