C t2 t1

C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1
C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1
C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1C t2 t1