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a=input()
b=input()
c=input()
k1=''
k2=''
x={}
for i in 'abcdefghijklmnopqrstuvwxyz':
    x[i]=0
for i in a:
    x[i]+=1
p=True
ans1=0
while p:
    p=False
    t=''
    for i in b:
        if x[i]>0:
            x[i]-=1
            t+=i
        else:
            for i in t:
                x[i]+=1
            break
    else:
        p=True
        k1+=t
        ans1+=1
p=True
while p:
    p=False
    t=''
    for i in c:
        if x[i]>0:
            x[i]-=1
            t+=i
        else:
            for i in t:
                x[i]+=1
            break
    else:
        p=True
        k1+=t
        ans1+=1
for i in x:
    while x[i]>0:
        x[i]-=1
        k1+=i
t=c
c=b
b=t
x={}
for i in 'abcdefghijklmnopqrstuvwxyz':
    x[i]=0
for i in a:
    x[i]+=1
p=True
ans2=0
while p:
    p=False
    t=''
    for i in b:
        if x[i]>0:
            x[i]-=1
            t+=i
        else:
            for i in t:
                x[i]+=1
            break
    else:
        p=True
        k2+=t
        ans2+=1
p=True
while p:
    p=False
    t=''
    for i in c:
        if x[i]>0:
            x[i]-=1
            t+=i
        else:
            for i in t:
                x[i]+=1
            break
    else:
        p=True
        k2+=t
        ans2+=1
for i in x:
    while x[i]>0:
        x[i]-=1
        k2+=i
if ans2>ans1:
    print(k2)
else:
    print(k1)