package main

import (
	"errors"
	"fmt"
	"io"
	"log"
	"math"
)

import (
	"fmt"

	"math"

	"log"

	"errors"

	"io"
)

import (
	"errors"
	"fmt"
	"io"
	"log"
	"math"

	"fmt"

	"math"

	"log"

	"errors"

	"io"
)

import (
	// a block with comments
	"errors"
	"fmt" // for Printf
	"io"  // for Reader
	"log" // for Fatal
	"math"
)

import (
	"fmt" // for Printf

	"math"

	"log" // for Fatal

	"errors"

	"io" // for Reader
)

import (
	// for Printf
	"fmt"

	"math"

	// for Fatal
	"log"

	"errors"

	// for Reader
	"io"
)

import (
	"errors"
	"fmt" // for Printf
	"io"  // for Reader
	"log" // for Fatal
	"math"

	"fmt" // for Printf

	"math"

	"log" // for Fatal

	"errors"

	"io" // for Reader
)

import (
	"fmt" // for Printf

	"errors"
	"io"  // for Reader
	"log" // for Fatal
	"math"

	"errors"
	"fmt" // for Printf
	"io"  // for Reader
	"log" // for Fatal
	"math"
)