●
●
●
○
●
●
○
●
○
○
●
●
●
●
●
●
●
○
●
○
○
●
●
●
●
●
●
○
●
●
●
○
●
●
○
○
●
●
○
●
○
●
●
●
●
●
○
●
●
●
●
○
●
●
●
○
●
●
●
○
●
●
●
●
●
●
●
●
○
●
●
●
○
○
○
●
●
○
●
●
○
●
○
●
○
●
○
●
●
●
●
●
○
●
●
●
●
●
●
●
●
●
●
●
○
●
●
●
○
●
○
●
●
●
○
○
●
○
○
●
●
○
○
○
●
●
●
●
●
○
●
●
○
●
●
●
●
●
○
●
●
○
●
●
○
●
○
●
○
●
●
○
●
●
○
●
○
●
○