bind -


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/*
tup = lambda n: " ".join([f"_{n}," for n in range(n + 1)])
for n in range(14):
    print(f"""
impl<{tup(n)}> Last for ({tup(n)}) {{
    type Init = ({tup(n - 1)});
    type Last = _{n};
    fn il(({tup(n - 1)}): Self::Init, last: Self::Last) -> ({tup(n)}) {{
        ({tup(n - 1)} last,)
    }}
}}
""")
*/
impl<_0> Last for (_0,) {
    type Init = ();
    type Last = _0;
    fn il((): Self::Init, last: Self::Last) -> (_0,) {
        (last,)
    }
}

impl<_0, _1> Last for (_0, _1) {
    type Init = (_0,);
    type Last = _1;
    fn il((_0,): Self::Init, last: Self::Last) -> (_0, _1) {
        (_0, last)
    }
}

impl<_0, _1, _2> Last for (_0, _1, _2) {
    type Init = (_0, _1);
    type Last = _2;
    fn il((_0, _1): Self::Init, last: Self::Last) -> (_0, _1, _2) {
        (_0, _1, last)
    }
}

impl<_0, _1, _2, _3> Last for (_0, _1, _2, _3) {
    type Init = (_0, _1, _2);
    type Last = _3;
    fn il((_0, _1, _2): Self::Init, last: Self::Last) -> (_0, _1, _2, _3) {
        (_0, _1, _2, last)
    }
}

impl<_0, _1, _2, _3, _4> Last for (_0, _1, _2, _3, _4) {
    type Init = (_0, _1, _2, _3);
    type Last = _4;
    fn il((_0, _1, _2, _3): Self::Init, last: Self::Last) -> (_0, _1, _2, _3, _4) {
        (_0, _1, _2, _3, last)
    }
}

impl<_0, _1, _2, _3, _4, _5> Last for (_0, _1, _2, _3, _4, _5) {
    type Init = (_0, _1, _2, _3, _4);
    type Last = _5;
    fn il((_0, _1, _2, _3, _4): Self::Init, last: Self::Last) -> (_0, _1, _2, _3, _4, _5) {
        (_0, _1, _2, _3, _4, last)
    }
}

impl<_0, _1, _2, _3, _4, _5, _6> Last for (_0, _1, _2, _3, _4, _5, _6) {
    type Init = (_0, _1, _2, _3, _4, _5);
    type Last = _6;
    fn il((_0, _1, _2, _3, _4, _5): Self::Init, last: Self::Last) -> (_0, _1, _2, _3, _4, _5, _6) {
        (_0, _1, _2, _3, _4, _5, last)
    }
}

impl<_0, _1, _2, _3, _4, _5, _6, _7> Last for (_0, _1, _2, _3, _4, _5, _6, _7) {
    type Init = (_0, _1, _2, _3, _4, _5, _6);
    type Last = _7;
    fn il(
        (_0, _1, _2, _3, _4, _5, _6): Self::Init,
        last: Self::Last,
    ) -> (_0, _1, _2, _3, _4, _5, _6, _7) {
        (_0, _1, _2, _3, _4, _5, _6, last)
    }
}

impl<_0, _1, _2, _3, _4, _5, _6, _7, _8> Last for (_0, _1, _2, _3, _4, _5, _6, _7, _8) {
    type Init = (_0, _1, _2, _3, _4, _5, _6, _7);
    type Last = _8;
    fn il(
        (_0, _1, _2, _3, _4, _5, _6, _7): Self::Init,
        last: Self::Last,
    ) -> (_0, _1, _2, _3, _4, _5, _6, _7, _8) {
        (_0, _1, _2, _3, _4, _5, _6, _7, last)
    }
}

impl<_0, _1, _2, _3, _4, _5, _6, _7, _8, _9> Last for (_0, _1, _2, _3, _4, _5, _6, _7, _8, _9) {
    type Init = (_0, _1, _2, _3, _4, _5, _6, _7, _8);
    type Last = _9;
    fn il(
        (_0, _1, _2, _3, _4, _5, _6, _7, _8): Self::Init,
        last: Self::Last,
    ) -> (_0, _1, _2, _3, _4, _5, _6, _7, _8, _9) {
        (_0, _1, _2, _3, _4, _5, _6, _7, _8, last)
    }
}

impl<_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10> Last
    for (_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10)
{
    type Init = (_0, _1, _2, _3, _4, _5, _6, _7, _8, _9);
    type Last = _10;
    fn il(
        (_0, _1, _2, _3, _4, _5, _6, _7, _8, _9): Self::Init,
        last: Self::Last,
    ) -> (_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10) {
        (_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, last)
    }
}

impl<_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11> Last
    for (_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11)
{
    type Init = (_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10);
    type Last = _11;
    fn il(
        (_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10): Self::Init,
        last: Self::Last,
    ) -> (_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11) {
        (_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, last)
    }
}

impl<_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12> Last
    for (_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12)
{
    type Init = (_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11);
    type Last = _12;
    fn il(
        (_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11): Self::Init,
        last: Self::Last,
    ) -> (_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12) {
        (_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, last)
    }
}

impl<_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13> Last
    for (_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13)
{
    type Init = (_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12);
    type Last = _13;
    fn il(
        (_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12): Self::Init,
        last: Self::Last,
    ) -> (_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _13) {
        (_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, last)
    }
}