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okay so lets say we did the first round if the second round weve added ground key were left with this value here the first thing you do is essentially do sub bytes so bytes is pretty straightforward for sub bytes we take a four and we look at the substitution table you look a four and were left with 49 so we replace it with 49 let me switch pens 5b or 5b 39 ei goes to 87 by way of e a 87 okay so thats how you do sub bytes now our after sub bytes were going to shift rows so for shift rows were just gonna literally shift the row for the first one we do nothing first row do nothing second row shift by one circular shift by one to the left circular shift by one to the right Im sorry the left again but it it circles back and a third one is shift by three and again its just circularly okay that ones pretty straight forward to this next one not so much so we got this sub by Scott shift rows yeah were gonna mix columns so so for the value thirty-nine we go with this column x this r