I started last month with an attendance in The XXII Conference on Applied Crystallography which took place in Targanice. I had an opportunity to listen to many lectures covering a really vast spectrum of topics related to crystallography and materials science. I presented a poster entitled "On Frequencies of Occurrence of Geometrically Characteristic Grain Boundaries". In fact, during the preparation of the poster, many new ideas came out for the future and I started to work on extending the considered ideas to the cases of all holohedral symmetries with at least two-fold symmetry axis.