Meaning of Different symbol

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Dear friends can any body tell me the meaning of different symbols showing in your activity list,Actually today one of my post deleted ,i dont know the reason,then i checked my activity list which post was deleted,then i found in my activity that post is showing but when i clicked that link ,it is showing post is deleted.There i found some symbols,in the post name some pen symbols are there and in some posts one green symbol there,what's the difference of those symbols.