LED0 = RB7
LED1 = RB6
LED2 = RB5
LED3 = RB4

Button 0 = RB0
Button 1 = RB1
Button 2 = RB2
Button 3 = RB3

A/D0 = RA0
A/D1 = RA1
A/D2 = RA2
A/D3 = RA3

SPK = RC0