N, Q = gets.chomp.split(" ").map{|s| s.to_i }
S = gets.chomp

q_arr = []
Q.times do |i|
  q_arr << gets.chomp.split(" ").map{|s| s.to_i }
end

iarr = []
(N-1).times do |i|
  iarr << i+1 if S[i..(i+1)] == "AC"
end

q_arr.each do |l, r|
  count = 0
  iarr.each do |ind|
    next if l > ind
    break if ind >= r
    count += 1
  end

  puts count
end
