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package main
//
// See ../README.md
//
//
// Run as: go run ch-1.go
//
import (
"fmt"
)
func g2j (Y int, M int, D int) int {
return ((1461 * (Y + 4800 + (M - 14) / 12)) / 4 +
(367 * (M - 2 - 12 * ((M - 14) / 12))) / 12 -
(3 * ((Y + 4900 + (M - 14) / 12) / 100)) / 4 + D - 32075)
}
func j2g (J int) (int, int, int) {
e := 4 * (J + 1401 + (((4 * J + 274277) / 146097) * 3) / 4 - 38) + 3
D := ((5 * ((e % 1461) / 4) + 2) % 153) / 5 + 1
M := (((5 * ((e % 1461) / 4) + 2) / 153 + 2) % 12) + 1
Y := (e / 1461) - 4716 + (12 + 2 - M) / 12
return Y, M, D
}
func main () {
julian_today := g2j (2021, 9, 22)
var Y, M, D int
for n, err := fmt . Scanf ("%d/%d/%d", &Y, &M, &D); n == 3 && err == nil
n, err = fmt . Scanf ("%d/%d/%d", &Y, &M, &D) {
julian_then := g2j (Y, M, D)
Y1, M1, D1 := j2g (2 * julian_then - julian_today)
Y2, M2, D2 := j2g (2 * julian_today - julian_then)
fmt . Printf ("%04d/%02d/%02d, %04d/%02d/%02d\n",
Y1, M1, D1, Y2, M2, D2);
}
}
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