Var A: array [0..3] of string; i: integer; begin A[0] := 'a'; A[1] := 'b'; A[2] := '0'; A[3] := '1'; for i := 0 to 3 do if ((length(a[i]) > 0) and (a[i][1] in ['a'..'z', 'A'..'Z'])) then writeln(A[i], '=> Yes') else writeln(A[i], '=> No'); end. Вот, прошу Вас:))