On every plan you have a HEXB and a HEXA choice. You get extra on red and green but just one of each on extra easy. Do you have the books, as it's all in there!
A snack could be a bowl of cereal or cheese on toast. But remember to weigh an use the correct amount.
I find it best to use HEXB and HEXA as part of a meal and stick to low syn snacks or free snacks