    (1:0) let a                   <--      (1:0) let a
          ^                                      ^

    (1:4) let a = `               <--      (1:4) let a = `
              ^                                      ^

    (1:5) et a = `a               <--      (1:5) et a = `a
              ^                                      ^

    (1:8) a = `a${b               <--      (1:8) a = `a${b
              ^                                      ^

   (1:12) `a${b}c`;               <--     (1:12) `a${b}c`;
              ^                                      ^

   (1:13) a${b}c`;                <--     (1:13) a${b}c`;
              ^                                      ^

   (1:16) b}c`;                   <--     (1:16) b}c`;
              ^                                      ^
