var f0 = Fn.new { 0 }
System.print(f0.call()) // expect: 0

var f1 = Fn.new {|a| a }
System.print(f1.call(1)) // expect: 1

var f2 = Fn.new {|a, b| a + b }
System.print(f2.call(1, 2)) // expect: 3

var f3 = Fn.new {|a, b, c| a + b + c }
System.print(f3.call(1, 2, 3)) // expect: 6

var f4 = Fn.new {|a, b, c, d| a + b + c + d }
System.print(f4.call(1, 2, 3, 4)) // expect: 10

var f5 = Fn.new {|a, b, c, d, e| a + b + c + d + e }
System.print(f5.call(1, 2, 3, 4, 5)) // expect: 15

var f6 = Fn.new {|a, b, c, d, e, f| a + b + c + d + e + f }
System.print(f6.call(1, 2, 3, 4, 5, 6)) // expect: 21

var f7 = Fn.new {|a, b, c, d, e, f, g| a + b + c + d + e + f + g }
System.print(f7.call(1, 2, 3, 4, 5, 6, 7)) // expect: 28

var f8 = Fn.new {|a, b, c, d, e, f, g, h| a + b + c + d + e + f + g + h }
System.print(f8.call(1, 2, 3, 4, 5, 6, 7, 8)) // expect: 36

var f9 = Fn.new {|a, b, c, d, e, f, g, h, i| a + b + c + d + e + f + g + h + i }
System.print(f9.call(1, 2, 3, 4, 5, 6, 7, 8, 9)) // expect: 45

var f10 = Fn.new {|a, b, c, d, e, f, g, h, i, j| a + b + c + d + e + f + g + h + i + j }
System.print(f10.call(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)) // expect: 55

var f11 = Fn.new {|a, b, c, d, e, f, g, h, i, j, k| a + b + c + d + e + f + g + h + i + j + k }
System.print(f11.call(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11)) // expect: 66

var f12 = Fn.new {|a, b, c, d, e, f, g, h, i, j, k, l| a + b + c + d + e + f + g + h + i + j + k + l }
System.print(f12.call(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)) // expect: 78

var f13 = Fn.new {|a, b, c, d, e, f, g, h, i, j, k, l, m| a + b + c + d + e + f + g + h + i + j + k + l + m }
System.print(f13.call(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)) // expect: 91

var f14 = Fn.new {|a, b, c, d, e, f, g, h, i, j, k, l, m, n| a + b + c + d + e + f + g + h + i + j + k + l + m + n }
System.print(f14.call(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)) // expect: 105

var f15 = Fn.new {|a, b, c, d, e, f, g, h, i, j, k, l, m, n, o| a + b + c + d + e + f + g + h + i + j + k + l + m + n + o }
System.print(f15.call(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)) // expect: 120

var f16 = Fn.new {|a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p| a + b + c + d + e + f + g + h + i + j + k + l + m + n + o + p }
System.print(f16.call(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)) // expect: 136