4
GBSGBBGBBBGBBBBGSBBBBBBGBBSGGBBGGGBBGBBBGBSSBGBGBGGBBBBBBBGBBGGBBBBBBGBGBBBBBBBGGBBSBSBBBBBBBGBBBGBBGBGGGSBGGBBGGBBBSBBBGBBBBGBBBBGSBGBBGSBGBBBBBSGGBGGGBBBGSBBBBBGSBBBGGGGGGGGGBBBGBBBBSSGGBBGBBBGGBBBBGBBSSGGBBGGBBGGBGGGBBGGBGBGGGGBBGBBBSGBBBGBBBBBBSBGGGBGGGGGSBBBGBGBSBBGGGGBGBSBBSGBSGBSBSSGSGBGGGBBGGGBBBGGBBBBBBGBGBBGGBBBSBSGSGGBSBBBSBSBBGBBGBBGGBBSGGBGGBBBBGGSBSGGBBGBBGBGBBBSBBBBBGSBBBSBGSG
