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function powerA(a) {
return a * powerB(a);
}
function powerB(a) {
return a * powerC(a);
}
function powerC(a) {
return a * powerD(a);
}
function powerD(a) {
return a * powerE(a);
}
function powerE(a) {
return a * 1;
}
alert(powerA(3));