已知等式\({{x}^{4}}+{{a}_{1}}{{x}^{3}}+{{a}_{2}}{{x}^{2}}+{{a}_{3}}x+{{a}_{4}}={{\left( x+1 \right)}^{4}}+{{b}_{1}}{{\left( x+1 \right)}^{3}}+{{b}_{2}}{{\left( x+1 \right)}^{2}}+{{b}_{3}}\left( x+1 \right)+{{b}_{4}}\)，定义映射\(f:\left( {{a}_{1}},{{a}_{2}},{{a}_{3}},{{a}_{4}} \right)\to \left( {{b}_{1}},{{b}_{2}},{{b}_{3}},{{b}_{4}} \right)\)，则\(f\left( 4,3,2,1 \right)=\)(    )