Complex sentence: Bereketis also composed two large cycles of the papadic genre (cherubic hymn and Sunday koinonikon) that are formulaically valid in, and can be chanted in any of the eight Byzantine modes without alteration of the actual neumes, varying only the starting pitch and modulatory symbols.
Split into simpler sentences: Bereketis also composed two large cycles of the papadic genre (cherubic hymn and Sunday koinonikon) that are formulaically valid in. One cherubikon can be chanted in any of the eight Byzantine modes without alteration of the actual neumes, varying only the starting pitch and modulatory symbols.