B signals

B signalsB signalsB signalsB signalsB signalsB signals
B signalsB signalsB signalsB signalsB signalsB signals
B signalsB signalsB signalsB signalsB signalsB signalsB signalsB signalsB signalsB signalsB signalsB signalsB signalsB signalsB signalsB signalsB signalsB signalsB signalsB signalsB signals