Input (grade 9): The groupâ s front man (and main song writer) is Armen Grigoryan (Ð Ñ Ð 1\/4 Ð Ð 1\/2 Ð "Ñ Ð Ð Ð 3\/4 Ñ Ñ Ð 1\/2).
Output (grade 8): The lead singer of the group is Armen Grigoryan (Ð Ñ Ð 1\/4 Ð Ð 1\/2 Ð "Ñ Ð Ð Ð 3\/4 Ñ Ñ Ð 1\/2).