Complete the summary:
A: Box 1: A
B: Box 1: B
C: Box 2: A
D: Box 2: B
E: Box 3: A
F: Box 3: B
G: Box 3: B
H: Box 4:A
I: Box 4: B
J: Box 5: A
K: Box 5: B
L: Box 6: A
M: Box 6: B