```
SELECT fuzzBits(toFixedString('', 200), 0.5) FROM system.numbers FORMAT Null
```
#include <Columns/ColumnFixedString.h>
#include <Columns/ColumnString.h>
#include <DataTypes/DataTypeString.h>
#include <Functions/FunctionFactory.h>
#include <Functions/FunctionHelpers.h>
#include <Functions/IFunction.h>
#include <pcg_random.hpp>
#include <Common/randomSeed.h>
#include <base/arithmeticOverflow.h>
#include <memory>
namespace DB
{
namespace ErrorCodes
{
    extern const int ILLEGAL_TYPE_OF_ARGUMENT;
    extern const int ILLEGAL_COLUMN;
    extern const int DECIMAL_OVERFLOW;
    extern const int ARGUMENT_OUT_OF_BOUND;
}
namespace
{
    inline UInt8 getXorMask(UInt64 rand, double prob)