The descending order of magnitudes of the vectors $\mathrm{A}=\frac{\mathrm{i}-\mathrm{j}}{\sqrt{2}}, \mathrm{B}=\overline{\mathrm{i}}+2\overline{\mathrm{k}}, \mathrm{C}=3\overline{\mathrm{i}}+\overline{\mathrm{k}}, \mathrm{D}=\overline{\mathrm{i}}+3\overline{\mathrm{j}}-\overline{\mathrm{k}}$ is

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