Please list the first names of the coaches whose team played in 1922's Stanley Cup finals.
teams refer to tmID; year = 1922;
SELECT T3.firstName FROM Coaches AS T1 INNER JOIN TeamsSC AS T2 ON T1.year = T2.year AND T1.tmID = T2.tmID INNER JOIN Master AS T3 ON T1.coachID = T3.coachID WHERE T2.year = 1922