#41818: python AC 解
n=int(input())
P=[]
for i in range(n):
m=list(map(int,input().split()))#first line
o=list(map(int,input().split()))#second line
Q=[]
if m[1]==m[3] or m[1]!=m[5] or o[1]==o[3] or o[1]!=o[5]:
Q.append("A")
if m[6]==1 and o[6]==0:
pass
else:
Q.append("B")
if m[1]==o[1] or m[3]==o[3] or m[5]==o[5]:
Q.append("C")
Q.append('\n')
if len(Q)==1:
P.append("None\n")
else:
for x in Q:
P.append(x)
for j in P:
print(j,end="")
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