n=int(input())
d={}
maxnum=0
for i in range(n):
    num,str_=map(str,input().split())
    num=int(num)
    
    if i<n/2:
        str_='-'
    if num>maxnum:
        maxnum=num
    if num in d:
        d[num].append(str_)
    else:
        d[num]=[str_]
for i in range(maxnum+1):
    print(' '.join(d[i]),end=' ')