what breed are the gray pullets?

i got these from tractor supply. what i thought we got was 4 ees, 2 olive eggers, 4 wyandottes. but what are the gray ones? i could tell the employee was having a hard time figuring out which chicks were which but they werent selling any breeds that looked like these at the time. i think theyre beautiful so im not complaining, but still, can anyone identify them?