struct Person {
mut:
    name string
    age  int
}

struct Pet {
mut:
    name  string
    color int
}

struct Programmer {
mut:
    pers Person
    pe   shared Pet
}

struct Pro {
mut:
    pers Person
    pe   Pet
}

fn main() {
    mut pr := Programmer{
        pers: Person{
            name: 'Qwe'
            age:  44
        }
        pe:   Pet{
            name:  'Ghj'
            color: 7
        }
    }
    pr.pe.color = 3
    shared y := pr.pe
    rlock y {
        println(y.color)
    }
    shared g := Pro{}
    g.pers.age = 42
    mut h := []shared Pro{len: 3}
    h[2].pers.age = 42
    println(h[2].pers.age)
}