public static void main ( String [ ] args ) throws IOException {
  BufferedReader br = new BufferedReader ( new InputStreamReader ( System . in ) ) ;
  BufferedWriter bw = new BufferedWriter ( new OutputStreamWriter ( System . out ) ) ;
  StringTokenizer st = new StringTokenizer ( br . readLine ( ) ) ;
  int N = Integer . parseInt ( st . nextToken ( ) ) ;
  int Q = Integer . parseInt ( st . nextToken ( ) ) ;
  char [ ] arr = br . readLine ( ) . toCharArray ( ) ;
  int [ ] num = new int [ N ] ;
  num [ 0 ] = 0 ;
  for ( int i = 1 ;
  i < N ;
  ++ i ) {
    num [ i ] = num [ i - 1 ] + ( arr [ i - 1 ] == 'A' && arr [ i ] == 'C' ? 1 : 0 ) ;
  }
  for ( int i = 0 ;
  i < Q ;
  ++ i ) {
    st = new StringTokenizer ( br . readLine ( ) ) ;
    int start = Integer . parseInt ( st . nextToken ( ) ) ;
    int end = Integer . parseInt ( st . nextToken ( ) ) ;
    bw . write ( ( num [ end - 1 ] - num [ start - 1 ] ) + "\n" ) ;
  }
  bw . close ( ) ;
}

public static void main ( String [ ] args ) throws IOException { BufferedReader br = new BufferedReader ( new InputStreamReader ( System . in ) ) ; BufferedWriter bw = new BufferedWriter ( new OutputStreamWriter ( System . out ) ) ; StringTokenizer st = new StringTokenizer ( br . readLine ( ) ) ; int N = Integer . parseInt ( st . nextToken ( ) ) ; int Q = Integer . parseInt ( st . nextToken ( ) ) ; char [ ] arr = br . readLine ( ) . toCharArray ( ) ; int [ ] num = new int [ N ] ; num [ 0 ] = 0 ; for ( int i = 1 ; i < N ; ++ i ) { num [ i ] = num [ i - 1 ] + ( arr [ i - 1 ] == ' A ' && arr [ i ] == ' C ' ? 1 : 0 ) ; } for ( int i = 0 ; i < Q ; ++ i ) { st = new StringTokenizer ( br . readLine ( ) ) ; int start = Integer . parseInt ( st . nextToken ( ) ) ; int end = Integer . parseInt ( st . nextToken ( ) ) ; bw . write ( ( num [ end - 1 ] - num [ start - 1 ] ) + " \n " ) ; } bw . close ( ) ; }
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