def space_input(p=''):
    s=raw_input(p).split()
    for i in range(len(s)):
        s[i]=eval(s[i])
    return tuple(s)
s=space_input()[1:]
while s!=():
    l=len(s)
    a=[0,1,2,3,4,5]
    while True:
        for i in range(6):
            print s[a[i]],
        print
        if a[5]<l-1:
            a[5]+=1
        elif a[4]<l-2:
            a[4]+=1
            a[5]=a[4]+1
        elif a[3]<l-3:
            a[3]+=1
            a[4]=a[3]+1
            a[5]=a[4]+1
        elif a[2]<l-4:
            a[2]+=1
            a[3]=a[2]+1
            a[4]=a[3]+1
            a[5]=a[4]+1
        elif a[1]<l-5:
            a[1]+=1
            a[2]=a[1]+1
            a[3]=a[2]+1
            a[4]=a[3]+1
            a[5]=a[4]+1
        elif a[0]<l-6:
            a[0]+=1
            a[1]=a[0]+1
            a[2]=a[1]+1
            a[3]=a[2]+1
            a[4]=a[3]+1
            a[5]=a[4]+1
        else:
            break
    print
    s=space_input()[1:]

/**************************************************************
	Problem: 2123
	User: admin
	Language: Python
	Result: Wrong Answer
****************************************************************/