Read the following words;

a) observing the principal and secondary stresses:

congratulation, ne,goti'ation, .fede'ration, ,individualization, .aspi'ration, .insti'tution, .requisition, ,indig'nation, e,vacu'ation

b) observing the principal stress:

'motivate стимулировать, dis'tribute, 'agitate, materialize, 'indicate, 'crystallize вылиться в форму, 'desiccate