contract C {
    function f() public {
        uint a = two();
        uint b = three();
        uint c = four();
    }
    function g() public {
        (uint a1, uint b1, uint c1, uint d1) = one();
        (uint a2, uint b2, uint c2) = one();
        (uint a3, uint b3) = one();
    }
    function h() public {
        (uint a1, uint b1, uint c1, uint d1) = three();
        (uint a2, uint b2, uint c2) = four();
    }
    function one() public pure returns (uint) {}
    function two() public pure returns (uint, uint) {}
    function three() public pure returns (uint, uint, uint) {}
    function four() public pure returns (uint, uint, uint, uint) {}
}
// ----
// TypeError: (47-61): Different number of components on the left hand side (1) than on the right hand side (2).
// TypeError: (71-87): Different number of components on the left hand side (1) than on the right hand side (3).
// TypeError: (97-112): Different number of components on the left hand side (1) than on the right hand side (4).
// TypeError: (154-198): Different number of components on the left hand side (4) than on the right hand side (1).
// TypeError: (208-243): Different number of components on the left hand side (3) than on the right hand side (1).
// TypeError: (253-279): Different number of components on the left hand side (2) than on the right hand side (1).
// TypeError: (321-367): Different number of components on the left hand side (4) than on the right hand side (3).
// TypeError: (377-413): Different number of components on the left hand side (3) than on the right hand side (4).