use std::io::{stdin,Read};

fn main() {
    let mut buf = String::new();
    stdin().read_to_string(&mut buf).unwrap();
    let mut tok = buf.split_whitespace();
    let mut get = || tok.next().unwrap();
    macro_rules! get {
        ($t:ty) => (get().parse::<$t>().unwrap());
        () => (get!(i64));
    }
    
    let mut d = get!(Date);
    
    d.add_days(2);
    
    println!("{}", d);
    // println!("{:?}", d);
}

#[derive(Debug)]
struct Date { year: i32, month: i32, day: i32 }

impl std::str::FromStr for Date {
    type Err = std::string::ParseError;
    fn from_str(s: &str) -> Result<Self,Self::Err> {
        let tok: Vec<i32> = s.split('/').filter_map(|s|s.parse().ok()).collect();
        Ok(Date{year: tok[0], month: tok[1], day: tok[2]})
    }
}

impl std::fmt::Display for Date {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> Result<(),std::fmt::Error> {
        write!(f, "{:04}/{:02}/{:02}", self.year, self.month, self.day)
    }
}

impl Date {
    fn add_days(&mut self, d: i32) -> &Self {
        self.day += d;
        let md = match self.month {
            4|6|9|11 => 30,
            2 if self.year % 400 == 0 => 29,
            2 if self.year % 100 == 0 => 28,
            2 if self.year % 4 == 0 => 29,
            2 => 28,
            _ => 31,
        };
        if self.day > md {
            self.day -= md;
            if self.month < 12 {
                self.month += 1;
            } else {
                self.month = 1;
                self.year += 1;
            }
        }
        self
    }
}