B c ca

B c caB c caB c caB c caB c caB c ca
B c caB c caB c caB c caB c caB c ca
B c caB c caB c caB c caB c caB c caB c caB c caB c caB c caB c caB c caB c caB c caB c caB c caB c caB c caB c caB c caB c caB c caB c caB c caB c caB c caB c caB c caB c caB c caB c caB c caB c caB c caB c caB c ca