Someone

w = 0
r = 0
b = 0

while true
        ipt = gets
        w = w+1 if ipt == 'w'
        r = r+1 if ipt == 'r'
        b = b+1 if ipt == 'b'
        print  w,',',r,',',b  if ipt == 't'
        break if ipt == 'c'
end