What is "sc" in notations?

for example, rose corner combo

c.lp, c.lk, c.mp xx lp spark, fadc, sc.hk, c.lp, sc.lk xx lk drill

i understand the rest, but what is sc.hk and sc.lk?

Standing close?

Dunno though I’ve always used cs. for that.

Standing Close.

I use cl. for that one.

I see why this would get confusing now, lol.