public static void main ( String [ ] args ) {
  Scanner reader = new Scanner ( System . in ) ;
  String S = reader . next ( ) ;
  int [ ] X = new int [ 10 ] ;
  for ( int k = 0 ;
  k < S . length ( ) ;
  k ++ ) {
    X [ k ] = Integer . parseInt ( Character . toString ( S . charAt ( k ) ) ) ;
  }
  int [ ] nearSevenDG = new int [ 10 ] ;
  int minGap = 1000 ;
  for ( int i = 0 ;
  i < S . length ( ) - 2 ;
  i ++ ) {
    int gap = Math . abs ( ( X [ i ] * 100 + X [ i + 1 ] * 10 + X [ i + 2 ] ) - 753 ) ;
    if ( gap < minGap ) {
      minGap = gap ;
    }
  }
  System . out . print ( minGap ) ;
}

public static void main ( String [ ] args ) { Scanner reader = new Scanner ( System . in ) ; String S = reader . next ( ) ; int [ ] X = new int [ 10 ] ; for ( int k = 0 ; k < S . length ( ) ; k ++ ) { X [ k ] = Integer . parseInt ( Character . toString ( S . charAt ( k ) ) ) ; } int [ ] nearSevenDG = new int [ 10 ] ; int minGap = 1000 ; for ( int i = 0 ; i < S . length ( ) - 2 ; i ++ ) { int gap = Math . abs ( ( X [ i ] * 100 + X [ i + 1 ] * 10 + X [ i + 2 ] ) - 753 ) ; if ( gap < minGap ) { minGap = gap ; } } System . out . print ( minGap ) ; }
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