var correctchoices=new Array()
correctchoices[1]='b'
correctchoices[2]='a'
correctchoices[3]='d'
correctchoices[4]='a'
correctchoices[5]='d'
correctchoices[6]='d'
correctchoices[7]='a'
correctchoices[8]='c'
correctchoices[9]='d'
correctchoices[10]='d'
correctchoices[11]='a'
correctchoices[12]='a'
correctchoices[13]='d'
correctchoices[14]='a'
correctchoices[15]='c'
correctchoices[16]='d'
correctchoices[17]='a'
correctchoices[18]='d'
correctchoices[19]='d'
correctchoices[20]='b'
correctchoices[21]='c'
correctchoices[22]='b'
correctchoices[23]='b'
correctchoices[24]='a'
correctchoices[25]='a'
correctchoices[26]='b'
correctchoices[27]='b'
correctchoices[28]='a'
correctchoices[29]='d'
correctchoices[30]='b'
correctchoices[31]='c'
correctchoices[32]='b'
correctchoices[33]='b'
correctchoices[34]='d'
correctchoices[35]='a'
correctchoices[36]='b'
correctchoices[37]='b'
correctchoices[38]='a'
correctchoices[39]='a'
correctchoices[40]='a'