找不到问题在哪

bianliang={}
daan=[]
daan_juzi=""
juzi_pre=[]
count=0
a,b=input().split()
for i in range(0,int(a)):
    c=input().split()
    bianliang[c[0]]=c[1]
for i in range(0,int(b)):
    juzi_pre.append(list(input()))
for juzi in juzi_pre:
    xiabiao=0
    for g in juzi:
        if g =="{":
            juzi.remove("{")
            juzi.remove("}")
            juzi[xiabiao]=bianliang[juzi[xiabiao]]
        xiabiao+=1
    daan_juzi=""
    for k in juzi:
        daan.append(k)
for i in daan:
    if i!="."or count==((int(b))-1):
        print(i,end="")
    else:
        print(i)
        count+=1