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]))