1	rieka	nominative case, singular	nominative case, singular
2	riekas	genitive case, singular	genitive case, singular
3	riekai	dative case, singular	dative case, singular
4	rieku	accusative case, singular	accusative case, singular
5	rieku	instrumental case, singular	instrumental case, singular
6	rieka	locative case, singular	locative case, singular
7	rieka	vocative case, singular	vocative case, singular
8	riekas	nominative case, plural	nominative case, plural
9	rieku	genitive case, plural	genitive case, plural
10	riekam	dative case, plural	dative case, plural
11	riekas	accusative case, plural	accusative case, plural
12	riekam	instrumental case, plural	instrumental case, plural
13	riekas	locative case, plural	locative case, plural
14	riekas	vocative case, plural	vocative case, plural