1st2nd3rd4th .10th11th .20th21st,22nd,23rd,24th,.,30th.31st,32nd,33rd,34th,.,40th.41st,42nd,43rd,44th,.,50th.51st,52nd,53rd,54th,.,60th.61st,62nd,63rd,64th,.,70th.71st,72nd,73rd,74th,.,80th.81st,82nd,...