gistfile1.txt

iex(20)> Stream.iterate(1,&(&1+1)) |> Stream.chunk(5) |> Stream.map(&({List.first(&1),&1}))  |>  Enum.take(100)
[{1, [1, 2, 3, 4, 5]}, {6, [6, 7, 8, 9, 10]}, {11, [11, 12, 13, 14, 15]},
 {16, [16, 17, 18, 19, 20]}, {21, [21, 22, 23, 24, 25]},
 {26, [26, 27, 28, 29, 30]}, {31, [31, 32, 33, 34, 35]}, {36, '$%&\'('},
 {41, ')*+,-'}, {46, './012'}, {51, '34567'}, {56, '89:;<'}, {61, '=>?@A'},
 {66, 'BCDEF'}, {71, 'GHIJK'}, {76, 'LMNOP'}, {81, 'QRSTU'}, {86, 'VWXYZ'},
 {91, '[\\]^_'}, {96, '`abcd'}, {101, 'efghi'}, {106, 'jklmn'}, {111, 'opqrs'},
 {116, 'tuvwx'}, {121, 'yz{|}'}, {126, [126, 127, 128, 129, 130]},
 {131, [131, 132, 133, 134, 135]}, {136, [136, 137, 138, 139, 140]},
 {141, [141, 142, 143, 144, 145]}, {146, [146, 147, 148, 149, 150]},
 {151, [151, 152, 153, 154, 155]}, {156, [156, 157, 158, 159, 160]},
 {161, [161, 162, 163, 164, 165]}, {166, [166, 167, 168, 169, 170]},
 {171, [171, 172, 173, 174, 175]}, {176, [176, 177, 178, 179, 180]},
 {181, [181, 182, 183, 184, 185]}, {186, [186, 187, 188, 189, 190]},
 {191, [191, 192, 193, 194, 195]}, {196, [196, 197, 198, 199, 200]},
 {201, [201, 202, 203, 204, 205]}, {206, [206, 207, 208, 209, 210]},
 {211, [211, 212, 213, 214, 215]}, {216, [216, 217, 218, 219, 220]},
 {221, [221, 222, 223, 224, ...]}, {226, [226, 227, 228, ...]},
 {231, [231, 232, ...]}, {236, [236, ...]}, {241, ...}, {...}, ...]
iex(21)> Stream.iterate(1,&(&1+1)) |> Stream.chunk(5) |> Stream.map(&({List.first(&1),&1}))  |>  Enum.take(10) 
[{1, [1, 2, 3, 4, 5]}, {6, [6, 7, 8, 9, 10]}, {11, [11, 12, 13, 14, 15]},
 {16, [16, 17, 18, 19, 20]}, {21, [21, 22, 23, 24, 25]},
 {26, [26, 27, 28, 29, 30]}, {31, [31, 32, 33, 34, 35]}, {36, '$%&\'('},
 {41, ')*+,-'}, {46, './012'}]
iex(22)> Stream.iterate(1,&(&1+1)) |> Stream.chunk(5) |> Stream.map(&({List.first(&1),&1}))  |>  Enum.take(3) 
[{1, [1, 2, 3, 4, 5]}, {6, [6, 7, 8, 9, 10]}, {11, [11, 12, 13, 14, 15]}]
iex(23)>