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from collections import defaultdict
alpha = "abcdefghijklmnopqrstuvwxyz"
a = raw_input()
b = raw_input()
c = raw_input()

hist = defaultdict(int)
for ai in a: hist[ai] += 1

ans = list(b + c)
for i in xrange(len(ans)):
        if hist[ans[i]] > 0:
                hist[ans[i]] -= 1
        else:
                ans[i] = "*"

rem = ""
for char in alpha:
        rem += char * hist[char]

j = 0
for i in xrange(len(ans)):
        if ans[i] == "*":
                ans[i] = rem[j]
                j += 1

print "".join(ans) + rem[j:]
