var correctchoices=new Array()
correctchoices[1]='c1'
correctchoices[2]='a6'
correctchoices[3]='d7'
correctchoices[4]='h4'
correctchoices[5]='d6'
correctchoices[6]='f8'
correctchoices[7]='a7'
correctchoices[8]='d1'
correctchoices[9]='c2'
correctchoices[10]='g5'