public static void main ( String [ ] args ) {
  Scanner scanner = new Scanner ( System . in ) ;
  String s = scanner . next ( ) ;
  String t = scanner . next ( ) ;
  int n = s . length ( ) , m = t . length ( ) ;
  int [ ] [ ] dp = new int [ n + 1 ] [ m + 1 ] ;
  for ( int i = n - 1 ;
  i > - 1 ;
  i -- ) {
    for ( int j = m - 1 ;
    j > - 1 ;
    j -- ) {
      dp [ i ] [ j ] = dp [ i ] [ j + 1 ] ;
      if ( s . charAt ( i ) == t . charAt ( j ) ) {
        dp [ i ] [ j ] += dp [ i + 1 ] [ j + 1 ] + 1 ;
        dp [ i ] [ j ] %= 1000000007 ;
      }
    }
  }
  int res = 0 ;
  for ( int i = 0 ;
  i < n ;
  i ++ ) {
    res += dp [ i ] [ 0 ] ;
    res %= 1000000007 ;
  }
  System . out . println ( res ) ;
}

public static void main ( String [ ] args ) { Scanner scanner = new Scanner ( System . in ) ; String s = scanner . next ( ) ; String t = scanner . next ( ) ; int n = s . length ( ) , m = t . length ( ) ; int [ ] [ ] dp = new int [ n + 1 ] [ m + 1 ] ; for ( int i = n - 1 ; i > - 1 ; i -- ) { for ( int j = m - 1 ; j > - 1 ; j -- ) { dp [ i ] [ j ] = dp [ i ] [ j + 1 ] ; if ( s . charAt ( i ) == t . charAt ( j ) ) { dp [ i ] [ j ] += dp [ i + 1 ] [ j + 1 ] + 1 ; dp [ i ] [ j ] %= 1000000007 ; } } } int res = 0 ; for ( int i = 0 ; i < n ; i ++ ) { res += dp [ i ] [ 0 ] ; res %= 1000000007 ; } System . out . println ( res ) ; }
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