#define CHANNEL_TO_BIT_NUMBER(channel) ((channel >= 1 && channel <= 14) ? (channel) : \
((channel >= 36 && channel <= 64 && (channel - 36) % 4 == 0) ? ((channel - 36) / 4 + 1) : \
((channel >= 100 && channel <= 144 && (channel - 100) % 4 == 0) ? ((channel - 100) / 4 + 9) : \
((channel >= 149 && channel <= 177 && (channel - 149) % 4 == 0) ? ((channel - 149) / 4 + 21) : 0))))