Orson, the 'components' are the Bs and Cs. I don't think it matters if you play the game from the top or the bottom, just work your way through the rows. All you have to do is take the four letters in the shaded section as your attempt, then see if they get marked, either side, with a B or a C. For example, the first row has STTI and there's a C to the left of that - so one of those letters is correct, but in the wrong place. The attempts that are marked with a B are slightly more helpful, as it means there's a correct letter in the correct place. The second bottom row was a big help.